1
|
Taga M, Sugimoto H, Momose K. Test-retest reliability of the ten-repetition maximum test in untrained young males and females. J Phys Ther Sci 2024; 36:598-602. [PMID: 39354928 PMCID: PMC11441898 DOI: 10.1589/jpts.36.598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Accepted: 06/29/2024] [Indexed: 10/03/2024] Open
Abstract
[Purpose] This study investigated the test-retest reliability of the ten-repetition maximum leg press (LP) and chest press (CP) tests in untrained young males and females. The secondary aim was to examine the test-retest reliability of the 10RM test according to gender. [Participants and Methods] All participants underwent the ten-repetition maximum test for the LP and CP across three sessions separated by 2 to 6 days of recovery: the first session was familiarization, the second for the initial test, and the third for the retest. To evaluate test-retest reliability, we calculated the intraclass correlation coefficient, standard error of measurement, and minimal detectable change for both the LP and CP. These measures were analyzed separately for each gender to assess gender-related differences. [Results] High intraclass correlation coefficient index was obtained for both LP and CP for both genderes. The standard errors of measurement and minimal detectable changes were consistent with previously reported values. However, females showed more variability than males, particularly in the LP. [Conclusion] The ten-repetition maximum test for LP and CP is a reliable method for measuring strength in untrained young males and females. However, it should be noted that the margin of error may be higher among female participants compared to their male counterparts.
Collapse
Affiliation(s)
- Masahito Taga
- Department of Rehabilitation, Ina Central Hospital: 1313-1 Koshiroukubo, Ina-shi, Nagano 396-8555, Japan
- Department of Health Sciences, Graduate School of Medicine, Shinshu University, Japan
| | - Hotaka Sugimoto
- Department of Health Sciences, Graduate School of Medicine, Shinshu University, Japan
- Division of Physical Therapy, Department of Rehabilitation, Faculty of Health Sciences, Nagano University of Health and Medicine, Japan
| | - Kimito Momose
- Department of Physical Therapy, School of Health Science, Shinshu University, Japan
| |
Collapse
|
2
|
Krogh LM, Nissen A, Weischendorff S, Hartmann B, Andersen JL, Holst JJ, Sørensen K, Fridh MK, Mackey AL, Müller K. Bone remodeling in survivors of pediatric hematopoietic stem cell transplantation: Impact of heavy resistance training. Pediatr Blood Cancer 2024; 71:e31159. [PMID: 38953152 DOI: 10.1002/pbc.31159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 05/23/2024] [Accepted: 06/09/2024] [Indexed: 07/03/2024]
Abstract
BACKGROUND Early-onset osteoporosis is a frequent late effect after pediatric hematopoietic stem cell transplantation (HSCT). It remains unknown if physical training can improve bone formation in these patients, as the transplantation procedure may cause sustained dysregulation of the bone-forming osteoblast progenitor cells. OBJECTIVE We aimed to explore the effect of resistance training on bone remodeling in long-term survivors of pediatric HSCT. PROCEDURE In this prospective, controlled intervention study, we included seven HSCT survivors and 15 age- and sex-matched healthy controls. The participants completed a 12-week heavy load, lower extremity resistance training intervention with three weekly sessions. We measured fasting serum levels of the bone formation marker "N-terminal propeptide of type I procollagen" (P1NP), and the bone resorption marker "C-terminal telopeptide of type I collagen" (CTX). The hypothesis was planned before data collection began. The trial was registered at Clinicaltrials.gov before including the first participant, with trial registration no. NCT04922970. RESULTS Resistance training led to significantly increased levels of fasting P1NP in both patients (from 57.62 to 114.99 ng/mL, p = .03) and controls (from 66.02 to 104.62 ng/mL, p < .001). No significant changes in fasting CTX levels were observed. CONCLUSIONS Despite previous high-dose cytotoxic therapy, long-term survivors of pediatric HSCT respond to resistance training with improvement of bone formation, comparable to that of healthy controls. This suggests that resistance training might be a promising non-pharmacological approach to prevent the early decline in bone mass, and should be considered as part of a follow-up program to counteract long-term sequela after pediatric HSCT.
Collapse
Affiliation(s)
- Lise Marie Krogh
- Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - Anne Nissen
- Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - Sarah Weischendorff
- Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- Institute for Inflammation Research, Center for Rheumatology and Spine Disease, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - Bolette Hartmann
- Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jesper Løvind Andersen
- Institute of Sports Medicine Copenhagen, Department of Orthopaedic Surgery, Copenhagen University Hospital - Bispebjerg & Frederiksberg, Copenhagen, Denmark
- Center for Healthy Aging, Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Jens Juul Holst
- Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Kaspar Sørensen
- Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- Department of Bone Marrow Transplantation and Immunodeficiency, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - Martin Kaj Fridh
- Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - Abigail Louise Mackey
- Institute of Sports Medicine Copenhagen, Department of Orthopaedic Surgery, Copenhagen University Hospital - Bispebjerg & Frederiksberg, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Klaus Müller
- Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- Institute for Inflammation Research, Center for Rheumatology and Spine Disease, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| |
Collapse
|
3
|
Sevilmiş E, Atalag O, Baytaş E, Henselmans M, Balyan M, Binboğa E. The Disconnect Between Soccer Players' Perceived and Actual Electromyographic-Measured Muscle Activation. Percept Mot Skills 2024:315125241279086. [PMID: 39214526 DOI: 10.1177/00315125241279086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Understanding muscle activation during exercises is crucial for devising effective training programs. We examined correlations between self-reported and electromyographic (EMG) muscle activity during upper-body exercises performed at loads corresponding to 4-6 repetition maximums (RMs). Thirteen male sub-elite soccer players who had previously engaged in resistance training participated in two testing sessions. In the initial session, the loads corresponding to 4-6 repetitions were determined for six exercises: Lat Pull Down (LPD), Barbell Bent Over Row (BBOR), Dumbbell Row (DR), Barbell Pull Over (BPO), Dumbbell Reverse Fly (DRF), and Dumbbell Concentration Curl (DCC). At post-exercise, participants rated their perceived muscle activation for three targeted muscles in each exercise on a 1-10 point Likert scale (LS). In the subsequent session, we used EMG to measure the activity of eight agonist and synergist muscles during these exercises. We found that one of two synergist muscles consistently demonstrated higher activity levels. Interestingly, we observed no difference in activity between primary and secondary (or synergist) muscles across all exercises. Most importantly, we found no significant correlation between the perceived muscle activation rate and the EMG measured activation level for any exercise. In conclusion, our findings suggest that, despite differential muscle activity during specific exercises, self-reported muscle activation may not accurately correspond to actual muscle activation, as measured via EMG, due to the participants' poor interoceptive awareness of muscles. These data highlight the potential limitations of relying on perceived muscle activation as a sole gauge of training intensity.
Collapse
Affiliation(s)
- Ezgi Sevilmiş
- Department of Coaching Education, Faculty of Sport Science, Girne American University, Girne, Cyprus
| | - Ozan Atalag
- Department of Coaching Education, University of Hawaii at Hilo, Hilo, HI, USA
| | - Eda Baytaş
- Department of Exercise and Sport Sciences, School of Physical Education and Sports, Istanbul Nişantaşı University, İstanbul, Turkey
| | - Menno Henselmans
- The International Scientific Research Foundation for Fitness and Nutrition, Amstelveen, Netherlands
| | - Melih Balyan
- Department of Physical Education and Sports, Faculty of Sport Science, Ege University, Izmir, Turkey
| | - Erdal Binboğa
- Faculty of Medicine, Department of Biophysics, Ege University, Izmir, Turkey
| |
Collapse
|
4
|
Paksoy Y, Kpobi D, Henschke J, Risch L, Engel T. A comparison of individual force decline profiles during a fatiguing eccentric trunk flexion and extension protocol: a pilot study. Front Sports Act Living 2024; 6:1431607. [PMID: 39234529 PMCID: PMC11371616 DOI: 10.3389/fspor.2024.1431607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2024] [Accepted: 08/05/2024] [Indexed: 09/06/2024] Open
Abstract
Introduction Muscle fatigue, characterized by diminished force production and contraction sustainability, can impair muscle coordination and increase joint instability. Differing force profiles used in fatiguing tasks, such as prolonged eccentric trunk protocols, might provide insights into individualized strategies and resulting spinal stability. Thus, this study assessed individual differences in fatigue characteristics during an eccentric trunk flexion-extension protocol in a population of asymptomatic individuals. Methods Twelve participants (2 f/10 m, 29 ± 4 years, 78.4 ± 16.9 kg, 1.76 ± 0.10 m) performed an eccentric trunk flexion and extension protocol on an isokinetic dynamometer (45° flexion to 10° extension; 60°/s), with final analysis on 8 participants for trunk flexion and 11 for trunk extension due to data exclusions. Participants engaged in a maximal all-out (AO) task for 2 min. Each participant's torque output (Nm) was assessed on a repetition-by-repetition basis, and smoothened by a moving average of 5 repetitions. Individual time profiles for reaching fatigue thresholds (10%, 15%, 20% and 30% reduction of initial torque output), and inter subject variability (by coefficient of variation, CV in %) were assessed throughout the AO task. Further, percentage torque reduction and variability were assessed at mid (1-minute) and end (2-minute) of task. Results On average, for flexor and extensor muscles combined, participants reached a force reduction of 10% within 23.2 ± 19.1 s, of 15% within 44.9 ± 19.6 s, of 20% in 62.4 ± 26.3 s, and of 30% within 79.2 ± 21.8 s. The variability between individuals for the timepoint of reaching the defined torque thresholds was assessed by CV ranged between 23.4% and 103.8% for trunk flexor muscles, and between 28.4% and 56.5% for trunk extensor muscles. Discussion A reduction of up to 20% was seen on average for all participants within 1-minute of eccentric trunk flexion and extension. Different inter-individual force output profiles were seen throughout the AO protocol, potentially related to physiological, skill-based, technical, adaptational, and/or motivational factors. The increase in fatigue resulted in a reduction in variability among individuals. A 2-minute protocol effectively induced pronounced fatigue, offering insights into individual force profiles and strategies.
Collapse
Affiliation(s)
- Yasemin Paksoy
- University Outpatient Clinic, Sports Medicine and Sports Orthopedics, University of Potsdam, Potsdam, Germany
| | - David Kpobi
- University Outpatient Clinic, Sports Medicine and Sports Orthopedics, University of Potsdam, Potsdam, Germany
| | - Jakob Henschke
- University Outpatient Clinic, Sports Medicine and Sports Orthopedics, University of Potsdam, Potsdam, Germany
| | - Lucie Risch
- University Outpatient Clinic, Sports Medicine and Sports Orthopedics, University of Potsdam, Potsdam, Germany
| | - Tilman Engel
- University Outpatient Clinic, Sports Medicine and Sports Orthopedics, University of Potsdam, Potsdam, Germany
| |
Collapse
|
5
|
Kamarunas E, Murray K, Drulia T, Szynkiewicz S, Griffin L, Mulheren R. Biofeedback and Exercise Load Affect Accuracy of Tongue Strength Exercise Performance. Dysphagia 2024:10.1007/s00455-024-10751-w. [PMID: 39154305 DOI: 10.1007/s00455-024-10751-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 08/12/2024] [Indexed: 08/19/2024]
Abstract
Rehabilitative exercises require precise movement coordination and target accuracy for optimal effectiveness. This paper explores the impact of tongue strength exercises (TSE) performance accuracy on exercise outcomes, adherence, and participant confidence and motivation. An 8-week randomized clinical trial included 84 typically aging participants divided into four groups defined by access to biofeedback (present/absent) and TSE intensity dosing (maximal/submaximal) during a home exercise program (HEP). Retention, training, and HEP accuracy were tracked at biweekly visits and during HEP for participants with access to a biofeedback device. Associations with tongue strength outcomes, participant factors, biofeedback, and intensity dosing were analyzed. Exercise accuracy measures did not contribute to tongue strength outcomes at the end of 8 weeks. Increased training accuracy (less practice required to achieve competency) was associated with higher participant confidence and better adherence to the HEP. The presence of biofeedback was associated with reduced adherence but better retention accuracy, while maximal intensity was associated with improvements in all accuracy measures compared to submaximal intensity exercise. These findings in typically aging participants suggest the need for tailored approaches in swallowing-related exercise programs, given the effects of biofeedback and exercise intensity on motor learning and exercise retention. Accuracy performance and its effect on clinical outcomes warrants study in clinical populations with dysphagia and with various rehabilitative approaches.Trial Registration Clincialtrials.gov: NCT04809558.
Collapse
Affiliation(s)
- Erin Kamarunas
- Department of Communication Sciences and Disorders, James Madison University, 235 MLK Jr. Way, MSC 4304, Harrisonburg, VA, 22807, USA.
| | - Kelsey Murray
- Department of Communication Sciences and Disorders, James Madison University, 235 MLK Jr. Way, MSC 4304, Harrisonburg, VA, 22807, USA
| | - Teresa Drulia
- Davies School of Communication Sciences and Disorders, Texas Christian University, Fort Worth, TX, USA
| | - Sarah Szynkiewicz
- Department of Communication Sciences and Disorders, Samford University, Birmingham, AL, USA
| | - Lindsay Griffin
- Department of Communication Sciences and Disorders, Emerson College, Boston, MA, USA
| | - Rachel Mulheren
- Department of Psychological Sciences, Case Western Reserve University, Cleveland, OH, USA
| |
Collapse
|
6
|
van den Tillaar R, Bao Fredriksen A, Hegdahl Gundersen A, Nygaard Falch H. Sex differences in intra-set kinematics and electromyography during different maximum repetition sets in the barbell back squat? PLoS One 2024; 19:e0308344. [PMID: 39110682 PMCID: PMC11305552 DOI: 10.1371/journal.pone.0308344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 07/22/2024] [Indexed: 08/10/2024] Open
Abstract
Barbell squats are commonly utilized in resistance training for rehabilitation, daily living enhancement, and improving sports performance. The current study investigated the kinematic and electromyographic (EMG) parameters in the squat between sexes across different repetition ranges (1-, 3-, 6-, and 10-RM) among recreationally strength-trained subjects. A total of 26 subjects (13 men: age 25 ± 3.5 years, height 178.2 ± 5.8 cm, weight 82.3 ± 9.1 kg; 13 women: age 24 ± 4.1 years, height 165.4 ± 6.3 cm, weight 68.2 ± 8.7 kg) participated in the study. The level of significance was set at p<0.05. The findings revealed no sex-specific differences in average barbell velocity across repetition ranges. However, the 1-RM showed a significantly lower average velocity compared to the final repetition of other repetition ranges (p<0.001), with the last repetition at 10-RM revealing a significantly higher velocity (p<0.001). Women had greater maximal angular hip extension velocity in the final repetitions of the 6- and 10-RM (p≤0.035, ηp2≤0.20), while both sexes displayed lower maximal angular knee extension velocity in the final repetition of the 10-RM (p = 0.028, ηp2 = 0.15). Moreover, men had lower EMG amplitude in the rectus femoris (3- and 10-RM), soleus, and lateral vastus (10-RM) compared to women (p≥0.011, ηp2≥0.26). It was concluded that 10-RM differed greatly in kinematics and EMG, suggesting different fatigue mechanisms compared to other repetition ranges with heavier loads. Furthermore, sex differences in EMG and angular hip extension velocity might imply sex-specific fatiguing mechanisms during high-repetition squats. These considerations could be important when prescribing training programs.
Collapse
Affiliation(s)
| | - Andrea Bao Fredriksen
- Department of Sports Science and Physical Education, Nord University, Levanger, Norway
| | | | | |
Collapse
|
7
|
Liu S, Wu C, Xiao S, Liu Y, Song Y. Optimizing young tennis players' development: Exploring the impact of emerging technologies on training effectiveness and technical skills acquisition. PLoS One 2024; 19:e0307882. [PMID: 39110745 PMCID: PMC11305591 DOI: 10.1371/journal.pone.0307882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 07/13/2024] [Indexed: 08/10/2024] Open
Abstract
The research analyzed the effect of weekly training plans, physical training frequency, AI-powered coaching systems, virtual reality (VR) training environments, wearable sensors on developing technical tennis skills, with and personalized learning as a mediator. It adopted a quantitative survey method, using primary data from 374 young tennis players. The model fitness was evaluated using confirmatory factor analysis (CFA), while the hypotheses were evaluated using structural equation modeling (SEM). The model fitness was confirmed through CFA, demonstrating high fit indices: CFI = 0.924, TLI = 0.913, IFI = 0.924, RMSEA = 0.057, and SRMR = 0.041, indicating a robust model fit. Hypotheses testing revealed that physical training frequency (β = 0.198, p = 0.000), AI-powered coaching systems (β = 0.349, p = 0.000), virtual reality training environments (β = 0.476, p = 0.000), and wearable sensors (β = 0.171, p = 0.000) significantly influenced technical skills acquisition. In contrast, the weekly training plan (β = 0.024, p = 0.834) and personalized learning (β = -0.045, p = 0.81) did not have a significant effect. Mediation analysis revealed that personalized learning was not a significant mediator between training methods/technologies and acquiring technical abilities. The results revealed that physical training frequency, AI-powered coaching systems, virtual reality training environments, and wearable sensors significantly influenced technical skills acquisition. However, personalized learning did not have a significant mediation effect. The study recommended that young tennis players' organizations and stakeholders consider investing in emerging technologies and training methods. Effective training should be given to coaches on effectively integrating emerging technologies into coaching regimens and practices.
Collapse
Affiliation(s)
- Sheng Liu
- Department of Physical Education and Military Education, Jingdezhen Ceramic University, Xianghu Town, Jingdezhen City, Jiangxi Province, China
| | - Chenxi Wu
- Department of Physical Education and Military Education, Jingdezhen Ceramic University, Xianghu Town, Jingdezhen City, Jiangxi Province, China
| | - Shurong Xiao
- Department of Physical Education and Military Education, Jingdezhen Ceramic University, Xianghu Town, Jingdezhen City, Jiangxi Province, China
| | - Yaxi Liu
- Department of Physical Education and Military Education, Jingdezhen Ceramic University, Xianghu Town, Jingdezhen City, Jiangxi Province, China
| | - Yingdong Song
- Department of Physical Education and Military Education, Jingdezhen Ceramic University, Xianghu Town, Jingdezhen City, Jiangxi Province, China
| |
Collapse
|
8
|
Cimadevilla-Fernández-Pola E, Martínez-Roldán C, Maté-Muñoz JL, Guodemar-Pérez J, Sánchez-Calabuig MA, García-Fernández P, Hervás-Pérez JP, Hernández-Lougedo J. Effects of β-Alanine Supplementation on Subjects Performing High-Intensity Functional Training. Nutrients 2024; 16:2340. [PMID: 39064783 PMCID: PMC11280034 DOI: 10.3390/nu16142340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2024] [Revised: 07/16/2024] [Accepted: 07/17/2024] [Indexed: 07/28/2024] Open
Abstract
BACKGROUND β-alanine, a non-essential amino acid found in the diet and produced through nucleotide catabolism, is significant for muscle performance due to its role in carnosine synthesis. This study aims to assess the impact of a 4-week β-alanine supplementation on neuromuscular fatigue in individuals engaging in High-Intensity Functional Training (HIFT) and its subsequent effect on sports performance, distinguishing between central fatigue from the CNS and peripheral fatigue from the muscular system. MATERIALS AND METHODS This study (a randomized controlled trial) comprised a total of 27 subjects, who were divided into two groups. Group A (the control group) was administered sucrose powder, while Group B (the experimental group) was given β-alanine powder. The subjects were randomly assigned to either the experimental or control groups. This study lasted four weeks, during which both groups participated in high-intensity interval training (HIFT) on the first day to induce fatigue and work close to their VO2 max. RESULTS Statistically significant changes were in the sports performance variables, specifically vertical jump and jumping power (p = 0.027). These changes were observed only in the group that had been supplemented with β-alanine. Nevertheless, no alterations were observed in any other variables, including fatigue, metabolic intensity of exercise, or perceived intensity (p > 0.05). CONCLUSIONS A four-week β-alanine intake program demonstrated an improvement in the capacity of subjects, as evidenced by enhanced vertical jump and power performance. Nevertheless, it does result in discernible alterations in performance.
Collapse
Affiliation(s)
- Eduardo Cimadevilla-Fernández-Pola
- Physiotherapy and Health Research Group (FYSA), Faculty of Health Sciences-HM Hospitals, University Camilo José Cela, Urb. Villafranca del Castillo, 49. Villanueva de la Cañada, 28692 Madrid, Spain; (E.C.-F.-P.); (C.M.-R.); (J.G.-P.); (M.A.S.-C.); (J.H.-L.)
- Instituto de Investigación Sanitaria HM Hospitales, 28692 Madrid, Spain
| | - Cristina Martínez-Roldán
- Physiotherapy and Health Research Group (FYSA), Faculty of Health Sciences-HM Hospitals, University Camilo José Cela, Urb. Villafranca del Castillo, 49. Villanueva de la Cañada, 28692 Madrid, Spain; (E.C.-F.-P.); (C.M.-R.); (J.G.-P.); (M.A.S.-C.); (J.H.-L.)
- Instituto de Investigación Sanitaria HM Hospitales, 28692 Madrid, Spain
| | - Jose Luis Maté-Muñoz
- Faculty of Nursing, Physiotherapy and Podiatry, Complutense University of Madrid, 28040 Madrid, Spain; (J.L.M.-M.); (P.G.-F.)
| | - Jesús Guodemar-Pérez
- Physiotherapy and Health Research Group (FYSA), Faculty of Health Sciences-HM Hospitals, University Camilo José Cela, Urb. Villafranca del Castillo, 49. Villanueva de la Cañada, 28692 Madrid, Spain; (E.C.-F.-P.); (C.M.-R.); (J.G.-P.); (M.A.S.-C.); (J.H.-L.)
- Instituto de Investigación Sanitaria HM Hospitales, 28692 Madrid, Spain
| | - Maria Aránzazu Sánchez-Calabuig
- Physiotherapy and Health Research Group (FYSA), Faculty of Health Sciences-HM Hospitals, University Camilo José Cela, Urb. Villafranca del Castillo, 49. Villanueva de la Cañada, 28692 Madrid, Spain; (E.C.-F.-P.); (C.M.-R.); (J.G.-P.); (M.A.S.-C.); (J.H.-L.)
- Instituto de Investigación Sanitaria HM Hospitales, 28692 Madrid, Spain
| | - Pablo García-Fernández
- Faculty of Nursing, Physiotherapy and Podiatry, Complutense University of Madrid, 28040 Madrid, Spain; (J.L.M.-M.); (P.G.-F.)
| | - Juan Pablo Hervás-Pérez
- Physiotherapy and Health Research Group (FYSA), Faculty of Health Sciences-HM Hospitals, University Camilo José Cela, Urb. Villafranca del Castillo, 49. Villanueva de la Cañada, 28692 Madrid, Spain; (E.C.-F.-P.); (C.M.-R.); (J.G.-P.); (M.A.S.-C.); (J.H.-L.)
- Instituto de Investigación Sanitaria HM Hospitales, 28692 Madrid, Spain
| | - Juan Hernández-Lougedo
- Physiotherapy and Health Research Group (FYSA), Faculty of Health Sciences-HM Hospitals, University Camilo José Cela, Urb. Villafranca del Castillo, 49. Villanueva de la Cañada, 28692 Madrid, Spain; (E.C.-F.-P.); (C.M.-R.); (J.G.-P.); (M.A.S.-C.); (J.H.-L.)
- Instituto de Investigación Sanitaria HM Hospitales, 28692 Madrid, Spain
| |
Collapse
|
9
|
Abdelkarim O, El-Gyar N, Shalaby AM, Aly M. The Effects of a School-Based Physical Activity Program on Physical Fitness in Egyptian Children: A Pilot Study from the DELICIOUS Project. CHILDREN (BASEL, SWITZERLAND) 2024; 11:842. [PMID: 39062291 PMCID: PMC11276202 DOI: 10.3390/children11070842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 06/28/2024] [Accepted: 07/05/2024] [Indexed: 07/28/2024]
Abstract
BACKGROUND Ensuring the physical fitness of Egyptian children is of paramount importance to their overall well-being, given the unique socio-cultural and educational barriers they face that may hinder their active participation. As part of the DELICIOUS project, the "Be Fit Program" aims to increase the level of physical fitness among Egyptian school-aged children. This study explores the effectiveness of a structured, six-week physical activity (PA) program in improving various facets of physical fitness in children, including body composition, speed, coordination, muscular strength, and cardiovascular endurance. With the increasing prevalence of sedentary lifestyles, such efforts are imperative to improve overall health outcomes. METHODS A cohort of 125 children, aged 8.50 to 12.25 y (mean age 10.19 ± 1.03 y), participated in the study. Their body composition, speed, coordination, strength, and aerobic fitness were assessed before and after the Be Fit Program using the revised International Physical Performance Test Profile. Paired t-tests were used to detect changes between the pre- and post-tests. RESULTS Following the six-week intervention, statistical analyses revealed significant improvements in coordination and lower body strength (p < 0.01). Aerobic endurance showed marginal improvements, approaching statistical significance (p = 0.06). Conversely, there were no statistically significant changes in body composition, speed, or upper body strength (p > 0.05). CONCLUSIONS The study confirms that tailored, non-competitive physical activities can positively influence specific fitness components in Egyptian children. However, achieving holistic improvements across all targeted fitness domains may require further strategic adjustments or a longer program duration. This pilot study underscores the importance of culturally tailored, school-based PA programs and highlights the continued need for research and program refinement to comprehensively improve children's fitness in the Egyptian context.
Collapse
Affiliation(s)
- Osama Abdelkarim
- Faculty of Physical Education, Assiut University, Assiut 71515, Egypt
| | - Noha El-Gyar
- Department of Pediatric, Faculty of Medicine, Assiut University, Assiut 71515, Egypt
| | - Amira M. Shalaby
- Department of Pediatric, Faculty of Medicine, Assiut University, Assiut 71515, Egypt
| | - Mohamed Aly
- Faculty of Physical Education, Assiut University, Assiut 71515, Egypt
| |
Collapse
|
10
|
Kotikangas J, Walker S, Peltonen H, Häkkinen K. Time Course of Neuromuscular Fatigue During Different Resistance Exercise Loadings in Power Athletes, Strength Athletes, and Nonathletes. J Strength Cond Res 2024; 38:1231-1242. [PMID: 38900602 DOI: 10.1519/jsc.0000000000004769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
ABSTRACT Kotikangas, J, Walker, S, Peltonen, H, and Häkkinen, K. Time course of neuromuscular fatigue during different resistance exercise loadings in power athletes, strength athletes, and nonathletes. J Strength Cond Res 38(7): 1231-1242, 2024-Training background may affect the progression of fatigue and neuromuscular strategies to compensate for fatigue during resistance exercises. Thus, our aim was to examine how training background affects the time course of neuromuscular fatigue in response to different resistance exercises. Power athletes (PA, n = 8), strength athletes (SA, n = 8), and nonathletes (NA, n = 7) performed hypertrophic loading (HL, 5 × 10 × 10RM), maximal strength loadings (MSL, 7 × 3 × 3RM) and power loadings (PL, 7 × 6 × 50% of 1 repetition maximum) in back squat. Average power (AP), average velocity (VEL), surface electromyography (sEMG) amplitude (sEMGRMS), and sEMG mean power frequency (sEMGMPF) were measured within all loading sets. During PL, greater decreases in AP occurred from the beginning of SET1 to SET7 and in VEL to both SET4 and SET7 in NA compared with SA (p < 0.01, g > 1.84). During HL, there were various significant group × repetition interactions in AP within and between sets (p < 0.05, ηp2 > 0.307), but post hoc tests did not indicate significant differences between the groups (p > 0.05, g = 0.01-0.93). During MSL and HL, significant within-set and between-set decreases occurred in AP (p < 0.001, ηp2 > 0.701) and VEL (p < 0.001, ηp2 > 0.748) concurrently with increases in sEMGRMS (p < 0.01, ηp2 > 0.323) and decreases in sEMGMPF (p < 0.01, ηp2 > 0.242) in all groups. In conclusion, SA showed fatigue resistance by maintaining higher AP and VEL throughout PL. During HL, PA tended to have the greatest initial fatigue response in AP, but between-group comparisons were nonsignificant despite large effect sizes (g > 0.8). The differences in the progression of neuromuscular fatigue may be related to differing neural activation strategies between the groups, but further research confirmation is required.
Collapse
Affiliation(s)
- Johanna Kotikangas
- Biology of Physical Activity, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
- NeuroMuscular Research Center, Jyväskylä, Finland; and
| | - Simon Walker
- Biology of Physical Activity, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
- NeuroMuscular Research Center, Jyväskylä, Finland; and
| | - Heikki Peltonen
- Biology of Physical Activity, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
- NeuroMuscular Research Center, Jyväskylä, Finland; and
- Sport Business, School of Business, Jamk University of Applied Science, Jyväskylä, Finland
| | - Keijo Häkkinen
- Biology of Physical Activity, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
- NeuroMuscular Research Center, Jyväskylä, Finland; and
| |
Collapse
|
11
|
Singh RG, Guérin-Deremaux L, Lefranc-Millot C, Perreau C, Crowley DC, Lewis ED, Evans M, Moulin M. Efficacy of Pea Protein Supplementation in Combination with a Resistance Training Program on Muscle Performance in a Sedentary Adult Population: A Randomized, Comparator-Controlled, Parallel Clinical Trial. Nutrients 2024; 16:2017. [PMID: 38999765 PMCID: PMC11243455 DOI: 10.3390/nu16132017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 06/12/2024] [Accepted: 06/14/2024] [Indexed: 07/14/2024] Open
Abstract
Animal-sourced whey protein (WPr) is the most popular protein supplement among consumers and has been shown to improve muscle mass and strength. However, due to allergies, dietary restrictions/personal choices, and growing demand, alternative protein sources are warranted. Sedentary adults were randomized to pea protein (PPr) or WPr in combination with a weekly resistance training program for 84 days. Changes in whole-body muscle strength (WBMS) including handgrip, lower body, and upper body strength, body composition, and product perception were assessed. The safety outcomes included adverse events, vital signs, clinical chemistry, and hematology. There were no significant differences in the change in WBMS, muscle mass, or product perception and likability scores between the PPr and WPr groups. The participants supplemented with PPr had a 16.1% improvement in WBMS following 84 days of supplementation (p = 0.01), while those taking WPr had an improvement of 11.1% (p = 0.06). Both study products were safe and well-tolerated in the enrolled population. Eighty-four days of PPr supplementation resulted in improvements in strength and muscle mass comparable to WPr when combined with a resistance training program in a population of healthy sedentary adults. PPr may be considered as a viable alternative to animal-sourced WPr without sacrificing muscular gains and product enjoyment.
Collapse
Affiliation(s)
- Ruma G. Singh
- KGK Science Inc., London, ON N6B 3L1, Canada; (R.G.S.); (D.C.C.); (E.D.L.); (M.E.)
| | | | | | - Caroline Perreau
- Life Sciences R&D, Roquette, 62136 Lestrem, France; (L.G.-D.); (C.P.); (C.L.-M.)
| | - David C. Crowley
- KGK Science Inc., London, ON N6B 3L1, Canada; (R.G.S.); (D.C.C.); (E.D.L.); (M.E.)
| | - Erin D. Lewis
- KGK Science Inc., London, ON N6B 3L1, Canada; (R.G.S.); (D.C.C.); (E.D.L.); (M.E.)
| | - Malkanthi Evans
- KGK Science Inc., London, ON N6B 3L1, Canada; (R.G.S.); (D.C.C.); (E.D.L.); (M.E.)
- Department of Biochemistry, Western University, London, ON N6A 3K7, Canada
| | - Marc Moulin
- KGK Science Inc., London, ON N6B 3L1, Canada; (R.G.S.); (D.C.C.); (E.D.L.); (M.E.)
| |
Collapse
|
12
|
Wohlgemuth KJ, Conner MJ, Tinsley GM, Palmer TB, Mota JA. Strategies for Improving Firefighter Health On-Shift: A Review. J Funct Morphol Kinesiol 2024; 9:105. [PMID: 38921641 PMCID: PMC11204757 DOI: 10.3390/jfmk9020105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 06/11/2024] [Accepted: 06/13/2024] [Indexed: 06/27/2024] Open
Abstract
The fire service suffers from high rates of cardiovascular disease and poor overall health, and firefighters often suffer fatal and non-fatal injuries while on the job. Most fatal injuries result from sudden cardiac death, while non-fatal injuries are to the musculoskeletal system. Previous works suggest a mechanistic link between several health and performance variables and injury risk. In addition, studies have suggested physical activity and nutrition can improve overall health and occupational performance. This review offers practical applications for exercise via feasible training modalities as well as nutritional recommendations that can positively impact performance on the job. Time-efficient training modalities like high-intensity interval training and feasible modalities such as resistance training offer numerous benefits for firefighters. Also, modifying and supplementing the diet and can be advantageous for health and body composition in the fire service. Firefighters have various schedules, making it difficult for planned exercise and eating while on shift. The practical training and nutritional aspects discussed in this review can be implemented on-shift to improve the overall health and performance in firefighters.
Collapse
Affiliation(s)
- Kealey J. Wohlgemuth
- Neuromuscular and Occupational Performance Laboratory, Texas Tech University, Lubbock, TX 79409, USA;
| | | | - Grant M. Tinsley
- Energy Balance and Body Composition Laboratory, Texas Tech University, Lubbock, TX 79409, USA;
| | - Ty B. Palmer
- Muscular Assessment Laboratory, Texas Tech University, Lubbock, TX 79409, USA;
| | - Jacob A. Mota
- Neuromuscular and Occupational Performance Laboratory, Texas Tech University, Lubbock, TX 79409, USA;
| |
Collapse
|
13
|
Graham MC, Thompson KL, Hawk GS, Fry CS, Noehren B. Muscle Fiber Cross-Sectional Area Is Associated With Quadriceps Strength and Rate of Torque Development After ACL Injury. J Strength Cond Res 2024; 38:e273-e279. [PMID: 38349361 PMCID: PMC11116075 DOI: 10.1519/jsc.0000000000004743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
ABSTRACT Graham, MC, Thompson, KL, Hawk, GS, Fry, CS, and Noehren, B. Muscle fiber cross-sectional area is associated with quadriceps strength and rate of torque development after ACL injury. J Strength Cond Res 38(6): e273-e279, 2024-The purpose of this study was to investigate the relationship between muscle fiber type-specific properties of the vastus lateralis and quadriceps muscle performance in individuals after an anterior cruciate ligament (ACL) tear. 26 subjects (22.0 ± 5.4 years) were included in this cross-sectional study, and all data were collected before ACL reconstruction. Quadriceps peak torque (QPT) and early (0-100 ms) and late (100-200 ms) rate of torque development (RTD) were obtained from maximal voluntary isometric quadriceps strength testing. Muscle fiber cross-sectional area (fCSA) and percent fiber type distribution (FT%) were evaluated through immunohistochemical analysis of a muscle biopsy. Between-limb differences in fiber characteristics were assessed using paired t-tests (with α-level 0.05). Relationships between fiber-specific properties and quadriceps muscle performance were determined using separate multiple linear regression analyses for ACL-injured and noninjured limbs. There were significant differences in fCSA between ACL-injured and noninjured limbs across all fiber types, but no differences in FT%. Type 1 fCSA, type 2a fCSA, and their interaction effect were the explanatory variables with the strongest relationship to all performance outcomes for the ACL-injured limb. The explanatory variables in the ACL-injured limb had a significant relationship to QPT and late RTD, but not early RTD. These findings suggest that QPT and late RTD are more heavily influenced by fCSA than FT% in ACL-injured limbs. This work serves as a foundation for the development of more specific rehabilitation strategies aimed at improving quadriceps muscle function before ACL reconstruction or for individuals electing nonsurgical management.
Collapse
Affiliation(s)
- Megan C Graham
- Department of Physical Therapy, University of Kentucky, Lexington, Kentucky
| | | | - Gregory S Hawk
- Department of Statistics, University of Kentucky, Lexington, Kentucky; and
| | - Christopher S Fry
- Department of Athletic Training & Clinical Nutrition, University of Kentucky, Lexington, Kentucky
| | - Brian Noehren
- Department of Physical Therapy, University of Kentucky, Lexington, Kentucky
| |
Collapse
|
14
|
Swinton PA, Schoenfeld BJ, Murphy A. Dose-Response Modelling of Resistance Exercise Across Outcome Domains in Strength and Conditioning: A Meta-analysis. Sports Med 2024; 54:1579-1594. [PMID: 38652410 PMCID: PMC11239729 DOI: 10.1007/s40279-024-02006-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2024] [Indexed: 04/25/2024]
Abstract
BACKGROUND Resistance exercise is the most common training modality included within strength and conditioning (S&C) practice. Understanding dose-response relationships between resistance training and a range of outcomes relevant to physical and sporting performance is of primary importance for quality S&C prescription. OBJECTIVES The aim of this meta-analysis was to use contemporary modelling techniques to investigate resistance-only and resistance-dominant training interventions, and explore relationships between training variables (frequency, volume, intensity), participant characteristics (training status, sex), and improvements across a range of outcome domains including maximum strength, power, vertical jump, change of direction, and sprinting performance. METHODS Data were obtained from a database of training studies conducted between 1962 and 2018, which comprised healthy trained or untrained adults engaged in resistance-only or resistance-dominant interventions. Studies were not required to include a control group. Standardized mean difference effect sizes were calculated and interventions categorized according to a range of training variables describing frequency (number of sessions per week), volume (number of sets and repetitions performed), overall intensity (intensity of effort and load, categorised as low, medium or high), and intensity of load (represented as % of one-repetition maximum [1RM] prescribed). Contemporary modelling techniques including Bayesian mixed-effects meta-analytic models were fitted to investigate linear and non-linear dose-responses with models compared based on predictive accuracy. RESULTS Data from a total of 295 studies comprising 535 groups and 6,710 participants were included with analyses conducted on time points ≤ 26 weeks. The best performing model included: duration from baseline, average number of sets, and the main and interaction effects between outcome domain and intensity of load (% 1RM) expressed non-linearly. Model performance was not improved by the inclusion of participant training status or sex. CONCLUSIONS The current meta-analysis represents the most comprehensive investigation of dose-response relationships across a range of outcome domains commonly targeted within strength and conditioning to date. Results demonstrate the magnitude of improvements is predominantly influenced by training intensity of load and the outcome measured. When considering the effects of intensity as a % 1RM, profiles differ across outcome domains with maximum strength likely to be maximised with the heaviest loads, vertical jump performance likely to be maximised with relatively light loads (~ 30% 1RM), and power likely to be maximised with low to moderate loads (40-70% 1RM).
Collapse
Affiliation(s)
- Paul Alan Swinton
- School of Health Sciences, Robert Gordon University, Garthdee Road, Aberdeen, AB10 7QG, UK.
| | - Brad J Schoenfeld
- Department of Exercise Science and Recreation, CUNY Lehman College, Bronx, NY, USA
| | - Andrew Murphy
- School of Health Sciences, Robert Gordon University, Garthdee Road, Aberdeen, AB10 7QG, UK
- Greater Western Sydney Giants, Sydney, NSW, Australia
| |
Collapse
|
15
|
Mendonca GV, Alves DL, Fitas A, Pezarat-Correia P. Minimum velocity threshold in response to the free-weight back squat: reliability and validity of different submaximal loading schemes. Eur J Appl Physiol 2024:10.1007/s00421-024-05494-3. [PMID: 38730035 DOI: 10.1007/s00421-024-05494-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 04/20/2024] [Indexed: 05/12/2024]
Abstract
PURPOSE To explore if mean concentric velocity (MCV) of the last repetition before set failure differs between free-weight back squat protocols with greater emphasis on metabolic accumulation vs. mechanical loading. The between-set and between-day reliability of terminal MCV obtained with these different loading schemes was also determined. METHODS Fifteen healthy male participants (18-30 years) were included. They all were required to exhibit a relative strength ≥ 1.5 times their body mass. MCVs were obtained at one-repetition maximum (1RM) and with two submaximal protocols (metabolic emphasis: three sets of 40%1RM with blood-flow restriction vs. mechanical emphasis: three sets 80%1RM without blood-flow restriction). Participants were instructed to reach maximal intended concentric velocity in each repetition up to failure. RESULTS Set failure was achieved at a faster MCV with the metabolic protocol (p < 0.05). The reliability of MCV at failure reached higher values for the metabolic loading scheme. However, while the MCV achieved at failure during the metabolic protocol was systematically higher than the MCV at 1RM (p < 0.05), this was not entirely the case for the mechanical protocol (similar to 1RM MCV during the last sets in both testing days). Finally, the absolute error derived from estimating the MCV at 1RM based on the MCV obtained at set failure with the mechanical protocol was considerably high (≥ 0.05 m/s). CONCLUSION This study indicates that MCV obtained at set failure is dependent on the specificity of the physiological demands of exercise. Thus, MCVs obtained at failure with submaximal loads should not be used to estimate 1RM MCV.
Collapse
Affiliation(s)
- Goncalo V Mendonca
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, 1499-002, Dafundo, Portugal.
- CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, 1499-002, Dafundo, Portugal.
| | - Diogo L Alves
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, 1499-002, Dafundo, Portugal
| | - Afonso Fitas
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, 1499-002, Dafundo, Portugal
- CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, 1499-002, Dafundo, Portugal
| | - Pedro Pezarat-Correia
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, 1499-002, Dafundo, Portugal
- CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, 1499-002, Dafundo, Portugal
| |
Collapse
|
16
|
Furtado ETF, Oliveira JPLDE, Pereira ISB, Veiga EP, Silva SFDA, Abreu WCDE. Short term creatine loading improves strength endurance even without changing maximal strength, RPE, fatigue index, blood lactate, and mode state. AN ACAD BRAS CIENC 2024; 96:e20230559. [PMID: 38747788 DOI: 10.1590/0001-3765202420230559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 01/16/2024] [Indexed: 06/15/2024] Open
Abstract
Creatine is consumed by athletes to increase strength and gain muscle. The aim of this study was to evaluate the effects of creatine supplementation on maximal strength and strength endurance. Twelve strength-trained men (25.2 ± 3.4 years) supplemented with 20 g Creatina + 10g maltodextrin or placebo (20g starch + 10g maltodextrin) for five days in randomized order. Maximal strength and strength endurance (4 sets 70% 1RM until concentric failure) were determined in the bench press. In addition, blood lactate, rate of perceived effort, fatigue index, and mood state were evaluated. All measurements were performed before and after the supplementation period. There were no significant changing in maximal strength, blood lactate, RPE, fatigue index, and mood state in either treatment. However, the creatine group performed more repetitions after the supplementation (Cr: Δ = +3.4 reps, p = 0.036, g = 0.53; PLA: Δ = +0.3reps, p = 0.414, g = 0.06), and higher total work (Cr: Δ = +199.5au, p = 0.038, g = 0.52; PLA: Δ = +26.7au, p = 0.402, g = 0.07). Creatine loading for five days allowed the subjects to perform more repetitions, resulting in greater total work, but failed to change the maximum strength.
Collapse
Affiliation(s)
- Edilson Tadeu F Furtado
- Universidade Federal de Lavras, Departamento de Nutrição, Faculdade de Ciências da Saúde, Trevo Rotatório Professor Edmir Sá Santos, s/n, 37203-202 Lavras, MG, Brazil
| | - João Paulo L DE Oliveira
- Universidade Federal de Lavras, Departamento de Nutrição, Faculdade de Ciências da Saúde, Trevo Rotatório Professor Edmir Sá Santos, s/n, 37203-202 Lavras, MG, Brazil
| | - Isabela S B Pereira
- Universidade Federal de Lavras, Departamento de Nutrição, Faculdade de Ciências da Saúde, Trevo Rotatório Professor Edmir Sá Santos, s/n, 37203-202 Lavras, MG, Brazil
| | - Elayne P Veiga
- Faculdade Presbiteriana Gammon, Educação Física, Praça Dr. Augusto Silva, 616, 37200-000 Lavras, MG, Brazil
| | - Sandro F DA Silva
- Universidade Federal de Lavras, Faculdade de Ciências da Saúde, Departamento de Educação Física, Trevo Rotatório Professor Edmir Sá Santos, s/n, 37203-202 Lavras, MG, Brazil
| | - Wilson César DE Abreu
- Universidade Federal de Lavras, Departamento de Nutrição, Faculdade de Ciências da Saúde, Trevo Rotatório Professor Edmir Sá Santos, s/n, 37203-202 Lavras, MG, Brazil
| |
Collapse
|
17
|
Salter D, Swamy S, Salis KM, Deep DK, Nadig P. A botanical extract blend of Mangifera indica and Sphaeranthus indicus combined with resistance exercise training improves muscle strength and endurance over exercise alone in young men: a randomized, blinded, placebo-controlled trial. Front Nutr 2024; 11:1393917. [PMID: 38765822 PMCID: PMC11099261 DOI: 10.3389/fnut.2024.1393917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Accepted: 04/19/2024] [Indexed: 05/22/2024] Open
Abstract
Resistance exercise training (RET) is used to improve muscular strength and function. This study tested the hypothesis that RET alongside daily supplementation of a Sphaeranthus indicus and Mangifera indica extract blend (SMI) would augment bench press (BP) and leg extension (LE) strength and repetitions to failure (RTF) compared to RET alone. Ninety-nine men (age 22 ± 3) completed the trial after randomization into one of four groups: (A1) 425 mg SMI plus one RET set; (A2) 850 mg SMI plus one RET set; (P1) placebo plus one RET set; and (P2) placebo plus two RET sets. RET sets were 6-8 BP and LE repetitions at 80% of a progressive one repetition maximum (1-RM), performed 3x/week for 8 weeks. Strength and RTF were evaluated at baseline and days 14, 28, and 56 while serum values of total testosterone (TT), free testosterone (FT), and cortisol (C) values were evaluated at baseline and day 56. RET significantly (p < 0.05) increased 1-RM, RTF, and T measures above baselines regardless of group assignment, but the increases were greater in the supplemented groups. At week 8, A1 bench pressed more than P1 (71.5.5 ± 17.5 kg vs. 62.0 ± 15.3 kg, p = 0.003), while A2 pressed 13.8 ± 3.0 kg more (95% CI 5.7-21.8, p < 0.001) than P1 and 9.9 ± 13.0 kg more (95% CI 1.7-18.2, p = 0.01) than P2. Also at week 8, the mean LE 1-RM of A1 (159.4 ± 22.6 kg) and A2 (162.2 ± 22.9 kg) was greater (p < 0.05) than that of P1 (142.2 ± 25.6 kg) and P2 (146.5 ± 19.7 kg). Supplementation improved RTF, TT, and FT values over those measured in exercise alone (p < 0.05), while C levels in A2 (9.3 ± 3.8 μg/dL) were lower than P2 (11.7 ± 3.8 μg/dL, p < 0.05). Daily supplementation with SMI was well tolerated and may help optimize muscle adaptive responses to RET in men.
Collapse
Affiliation(s)
- Dawna Salter
- Department of Clinical Research and Innovation, PLT Health Solutions, Inc., Morristown, NJ, United States
| | - Shubhatara Swamy
- Department of Pharmacology, Vydehi Institute of Medical Sciences and Research Centre, Bengaluru, India
| | - Kevin Manohar Salis
- Department of Pharmacology, Vydehi Institute of Medical Sciences and Research Centre, Bengaluru, India
| | | | - Pratibha Nadig
- Department of Pharmacology, Vydehi Institute of Medical Sciences and Research Centre, Bengaluru, India
| |
Collapse
|
18
|
Roizenblatt M, Gehlbach PL, Marin VDG, Roizenblatt A, Saraiva VDS, Nakanami MH, Noia LDC, Watanabe SES, Yasaki ES, Passos RM, Magalhães O, Fernandes RAB, Stefanini FR, Caiado R, Jiramongkolchai K, Farah ME, Belfort R, Maia M. ASSESSMENT OF SIMULATED SURGICAL DEXTERITY AFTER MODIFIABLE EXTERNAL EXPOSURES AMONG NOVICE VERSUS EXPERIENCED VITREORETINAL SURGEONS. Retina 2024; 44:820-830. [PMID: 38194677 DOI: 10.1097/iae.0000000000004045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
PURPOSE To evaluate novice and senior vitreoretinal surgeons after various exposures. Multiple comparisons ranked the importance of these exposures for surgical dexterity based on experience. METHODS This prospective cohort study included 15 novice and 11 senior vitreoretinal surgeons (<2 and >10 years' practice, respectively). Eyesi-simulator tasks were performed after each exposure. Day 1, placebo, 2.5 mg/kg caffeine, and 5.0 mg/kg caffeine; day 2, placebo, 0.2 mg/kg propranolol, and 0.6 mg/kg propranolol; day 3, baseline simulation, breathalyzer readings of 0.06% to 0.10% and 0.11% to 0.15% blood alcohol concentrations; day 4, baseline simulation, push-up sets with 50% and 85% repetitions maximum; and day 5, 3-hour sleep deprivation. Eyesi-generated score (0-700, worst-best), out-of-tolerance tremor (0-100, best-worst), task completion time (minutes), and intraocular pathway (in millimeters) were measured. RESULTS Novice surgeons performed worse after caffeine (-29.53, 95% confidence interval [CI]: -57.80 to -1.27, P = 0.041) and alcohol (-51.33, 95% CI: -80.49 to -22.16, P = 0.001) consumption. Alcohol caused longer intraocular instrument movement pathways (212.84 mm, 95% CI: 34.03-391.65 mm, P = 0.02) and greater tremor (7.72, 95% CI: 0.74-14.70, P = 0.003) among novices. Sleep deprivation negatively affected novice performance time (2.57 minutes, 95% CI: 1.09-4.05 minutes, P = 0.001) and tremor (8.62, 95% CI: 0.80-16.45, P = 0.03); however, their speed increased after propranolol (-1.43 minutes, 95% CI: -2.71 to -0.15 minutes, P = 0.029). Senior surgeons' scores deteriorated only following alcohol consumption (-47.36, 95% CI: -80.37 to -14.36, P = 0.005). CONCLUSION Alcohol compromised all participants despite their expertise level. Experience negated the effects of caffeine, propranolol, exercise, and sleep deprivation on surgical skills.
Collapse
Affiliation(s)
- Marina Roizenblatt
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
- Vision Institute, IPEPO, Universidade Federal de São Paulo, São Paulo, Brazil
- The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Peter L Gehlbach
- The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Vitor D G Marin
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Arnaldo Roizenblatt
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Vinicius da S Saraiva
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
- Vision Institute, IPEPO, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Mauricio H Nakanami
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Luciana da C Noia
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Sung E S Watanabe
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Erika S Yasaki
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Renato M Passos
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
- Vision Institute, IPEPO, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Octaviano Magalhães
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Rodrigo A B Fernandes
- Keck School of Medicine, University of Southern California, Los Angeles, California; and
| | | | - Rafael Caiado
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | - Michel E Farah
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
- Vision Institute, IPEPO, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Rubens Belfort
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
- Vision Institute, IPEPO, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Mauricio Maia
- Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
- Vision Institute, IPEPO, Universidade Federal de São Paulo, São Paulo, Brazil
| |
Collapse
|
19
|
Hegdahl Gundersen A, Nygaard Falch H, Bao Fredriksen A, van den Tillaar R. The Effect of Sex and Different Repetition Maximums on Kinematics and Surface Electromyography in the Last Repetition of the Barbell Back Squat. J Funct Morphol Kinesiol 2024; 9:75. [PMID: 38651433 PMCID: PMC11036245 DOI: 10.3390/jfmk9020075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 04/15/2024] [Accepted: 04/15/2024] [Indexed: 04/25/2024] Open
Abstract
During the ascent phase of a maximal barbell back squat after an initial acceleration, a deceleration region occurs as the result of different biomechanical factors. This is known as the sticking region. However, whether this region is similar in the last repetition of different repetition maximums and if sex has an impact on biomechanics of this region are not known. Therefore, this study investigated the effect of sex (men/women) and repetition maximum (1-, 3-, 6-, and 10RM) on kinematics and surface electromyography around the sticking region. Twenty-six resistance-trained individuals comprising 13 men (body mass: 82.2 ± 8.7; age: 23.6 ± 1.9; height: 181.1 ± 6.5) and 13 women (body mass: 63.6 ± 6.6; age: 23.9 ± 4.5; height: 166.0 ± 4.5) participated in the study. The main findings were that women, in comparison to men, displayed larger trunk lean and lower hip extension angles in the sticking region, possibly due to different hip/knee extensor strength ratios. Moreover, an inverse relationship was discovered between repetition range and timing from V0 to Vmax2, in which lower repetition ranges (1- and 3RM) were shorter in Vmax2 compared to higher ranges (6- and 10RM). It was concluded that this occurrence is due to more moments of inertia in lower repetition ranges. Our findings suggest that both sex and repetition range might induce different requirements during the squat ascent.
Collapse
Affiliation(s)
| | | | | | - Roland van den Tillaar
- Department of Sports Sciences, Nord University, 7600 Levanger, Norway; (A.H.G.); (H.N.F.); (A.B.F.)
| |
Collapse
|
20
|
Pişkin NE, Yavuz G, Aktuğ ZB, Aldhahi MI, Al-Mhanna SB, Gülü M. The Effect of Combining Blood Flow Restriction with the Nordic Hamstring Exercise on Hamstring Strength: Randomized Controlled Trial. J Clin Med 2024; 13:2035. [PMID: 38610800 PMCID: PMC11012977 DOI: 10.3390/jcm13072035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/22/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024] Open
Abstract
(1) Background: It is a matter of curiosity what effect the blood flow restriction (BFR) method, which is usually combined with low-intensity resistance exercises, will have when used with high-intensity eccentric exercises. (2) Methods: The present study examined the effects of combining BFR with nordic hamstring exercises (NHEs) on hamstring muscle strength, bilateral deficit (BLD), and training volume. Thirty young female volleyball players, who trained three times a week, participated voluntarily in the study. These players were stratified into three groups, each comprising ten individuals: a control group (CG), an NHE group, and an NHE + BFR group. Hamstring muscle strength and BLD values were determined using an H-BORD device, while training volume was measured in terms of sets and repetitions. (3) Results: Statistical analysis revealed that there were no statistically significant differences in non-dominant and dominant leg peak torque parameters in the exercise groups (F = 2.65; p = 0.097; ηp2 = 0.17; F = 1.15; p = 0.0334; ηp2 = 0.084), while the total training volume was lower in the NHE + BFR group. (4) Conclusions: As a result, it was seen that adding the BFR method to NHE did not provide additional gains. However, due to the low training volume of BFR + NHE, it may be recommended to apply BFR together with NHE to athlete groups.
Collapse
Affiliation(s)
- Necdet Eray Pişkin
- Department of Movement and Training Sciences, Faculty of Sports Sciences, Nigde Omer Halisdemir University, Niğde 51240, Türkiye;
| | - Gönül Yavuz
- Department of Physical Education and Sports, Faculty of Sports Sciences, Kahramanmaras Sutcu Imam University, Kahramanmaras 46050, Türkiye;
| | - Zait Burak Aktuğ
- Department of Physical Education and Sports, Faculty of Sports Sciences, Nigde Omer Halisdemir University, Niğde 51240, Türkiye;
| | - Monira I. Aldhahi
- Department of Rehabilitation Sciences, College of Health and Rehabilitation Sciences, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Sameer Badri Al-Mhanna
- Department of Physiology, School of Medical Sciences, University Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia;
| | - Mehmet Gülü
- Department of Sports Management, Faculty of Sport Sciences, Kirikkale University, Kirikkale 71450, Türkiye
| |
Collapse
|
21
|
Marcos-Pardo PJ, Espeso-García A, Vaquero-Cristóbal R, Abelleira-Lamela T, González-Gálvez N. The Effect of Resistance Training with Outdoor Fitness Equipment on the Body Composition, Physical Fitness, and Physical Health of Middle-Aged and Older Adults: A Randomized Controlled Trial. Healthcare (Basel) 2024; 12:726. [PMID: 38610148 PMCID: PMC11011249 DOI: 10.3390/healthcare12070726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/16/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
This study examined the effect of outdoor-fitness-equipment-based resistance training on the health parameters of middle-aged and older adults, as well as analyzing the effect of age on the results found. A total of 149 volunteers were randomly assigned to the training (TG) and control (CG) groups. The TG performed two weekly sessions of resistance training for 8 weeks using outdoor fitness equipment, while the CG continued with their regular daily activities. Body composition was measured using DXA, and the maximal isometric voluntary contraction in knee extension, elbow flexion, and hand grip were assessed, along with the 4 m walk test, the Timed Up and Go Test, and the Short Form 36 Health Survey Questionnaire. The TG showed a significant increase in the lean mass index (p = 0.002) and maximal isometric voluntary contraction in both legs (p < 0.001) and arms (p < 0.001), as well as in physical functioning (p < 0.001) and the role physical dimension (p = 0.006) of the Short Form 36 Health Survey Questionnaire, compared to the CG, which showed a decrease in all these variables. In addition, the TG showed a greater decrease in fat mass (p < 0.001), fat mass index (p = 0.003), and the Timed Up and Go Test (p < 0.001) than the CG. Age conditioned the evolution of most of the variables analyzed (p < 0.05). In conclusion, resistance training with outdoor fitness equipment may be useful for improving the health of middle-aged and older adults, although age is a factor that could influence the adaptations found.
Collapse
Affiliation(s)
- Pablo J. Marcos-Pardo
- Centro de Investigación para el Bienestar y la Inclusión Social (CIBIS Research Center), SPORT Research Group (CTS-1024), Department of Education, Faculty of Education Sciences, University of Almería, 04120 Almería, Spain;
- Active Aging, Exercise and Health/HEALTHY-AGE Network, Consejo Superior de Deportes (CSD), Ministry of Culture and Sport of Spain, 28040 Madrid, Spain;
| | - Alejandro Espeso-García
- Injury Prevention in Sport Research Group (PRELEDE), Facultad de Deporte, UCAM Universidad Católica de Murcia, 30107 Murcia, Spain;
| | - Raquel Vaquero-Cristóbal
- Active Aging, Exercise and Health/HEALTHY-AGE Network, Consejo Superior de Deportes (CSD), Ministry of Culture and Sport of Spain, 28040 Madrid, Spain;
- Department of Physical Activity and Sport Sciences, Faculty of Sports Sciences, University of Murcia, 30720 Murcia, Spain
| | - Tomás Abelleira-Lamela
- Injury Prevention in Sport Research Group (PRELEDE), Facultad de Deporte, UCAM Universidad Católica de Murcia, 30107 Murcia, Spain;
| | - Noelia González-Gálvez
- Active Aging, Exercise and Health/HEALTHY-AGE Network, Consejo Superior de Deportes (CSD), Ministry of Culture and Sport of Spain, 28040 Madrid, Spain;
- Research Group on Health, Physical Activity, Fitness and Motor Behaviour (GISAFFCOM), Facultad de Deporte, UCAM Universidad Católica de Murcia, 30107 Murcia, Spain
| |
Collapse
|
22
|
Kritzer TD, Lang CJ, Holmes MWR, Cudlip AC. Sex differences in strength at the shoulder: a systematic review. PeerJ 2024; 12:e16968. [PMID: 38525275 PMCID: PMC10960529 DOI: 10.7717/peerj.16968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 01/26/2024] [Indexed: 03/26/2024] Open
Abstract
Background Understanding differential strength capability between sexes is critical in ergonomics and task design. Variations in study designs and outcome measures generates challenges in establishing workplace guidelines for strength requirements to minimize upper extremity risk for workers. The purpose of this systematic review was to collate and summarize sex differences in strength at the shoulder across movement directions and contraction types. Methods A total of 3,294 articles were screened from four databases (Embase, Medline, SCOPUS, and Web of Science). Eligibility criteria included observational studies, direct measurement of muscular joint, and healthy adult participants (18-65 years old). Strength outcome measures were normalized to percentages of male outputs to allow comparisons across articles. Results A total of 63 studies were included within the final review. Majority of articles observed increased strength in males; the gap between male-female strength was greater in flexion and internal/external rotation, with females generating ~30% of male strength; scaption strength ratios were most consistent of the movement groups, with females generating 55-62% of male strength. Conclusion Sex strength differences should be considered as an important factor for workplace task design as women are more at risk for occupational-related injuries than men in equivalent strength requirements. Differences in strength were not synonymous across motions; females demonstrated increased disparity relative to male strength in horizontal flexion/extension, forward flexion and internal/external rotation. Some movements had an extremely limited pool of available studies for examination which identified critical research gaps within the literature. Collating and quantifying strength differences is critical for effective workstation design with a range of users to mitigate potential overexertion risk and musculoskeletal injury.
Collapse
Affiliation(s)
- Tamar D. Kritzer
- Department of Kinesiology, Brock University, St. Catharines, ON, Canada
| | - Cameron J. Lang
- Department of Kinesiology, Brock University, St. Catharines, ON, Canada
| | | | - Alan C. Cudlip
- Department of Kinesiology and Health Sciences, University of Waterloo, Waterloo, ON, Canada
| |
Collapse
|
23
|
Nazir A, Heryaman H, Juli C, Ugusman A, Martha JW, Moeliono MA, Atik N. Resistance Training in Cardiovascular Diseases: A Review on Its Effectiveness in Controlling Risk Factors. Integr Blood Press Control 2024; 17:21-37. [PMID: 38523733 PMCID: PMC10959113 DOI: 10.2147/ibpc.s449086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 03/06/2024] [Indexed: 03/26/2024] Open
Abstract
Cardiovascular Disease (CVD), a term encompassing various disorders affecting the heart and blood vessels, includes coronary artery disease (CAD). CAD is primarily due to the development of atherosclerotic plaques that disrupt blood flow, oxygenation, and nutrient delivery to the myocardium. Risk factors contributing to CAD progression include smoking, hypertension, diabetes mellitus (DM), dyslipidaemia, and obesity. While aerobic exercise (AE) has shown promising results in controlling CVD risk factors, the impact of resistance training (RT) has not been extensively investigated. This review aims to describe the effects of RT on CVD risk factors based on studies retrieved from PubMed and Google Scholar databases. Both isometric and isotonic RT have been found to decrease systolic blood pressure (SBP), diastolic blood pressure, or mean arterial pressure, with SBP showing a more significant reduction. Hypertensive patients engaging in RT alongside a calorie-restricted diet demonstrated significant improvements in blood pressure. RT is associated with increased nitric oxide bioavailability, sympathetic modulation, and enhanced endothelial function. In type-2 DM patients, 8-12 weeks of RT led to improvements in fasting blood glucose levels, insulin secretion, metabolic syndrome risk, and glucose transporter numbers. Combining AE with RT had a more significant impact in reducing insulin resistance and enhancing blood glucose compared to performing exercises separately. It also significantly decreased total cholesterol, triglycerides, and low-density lipoprotein levels while increasing high-density lipoprotein within 12 weeks of application. However, improvements are considered insignificant when lipid levels are already low to normal at baseline. The administration of RT resulted in weight loss and improved body mass index, with more pronounced effects seen when combining AE with RT and a calorie-restricted diet. Considering these results, the administration of RT, either alone or in combination with AE, proves beneficial in rehabilitating CAD patients by improving various risk factors.
Collapse
Affiliation(s)
- Arnengsih Nazir
- Doctoral Program, Faculty of Medicine, Padjadjaran University, Bandung, WJ, Indonesia
- Department of Physical and Rehabilitation Medicine, Dr. Hasan Sadikin General Hospital/Faculty of Medicine, Padjadjaran University, Bandung, WJ, Indonesia
| | - Henhen Heryaman
- Doctoral Program, Faculty of Medicine, Padjadjaran University, Bandung, WJ, Indonesia
- Department of Biomedical Sciences, Faculty of Medicine, Padjadjaran University, Bandung, WJ, Indonesia
| | - Cep Juli
- Department of Neurology, Dr. Hasan Sadikin General Hospital/Faculty of Medicine Padjadjaran University, Bandung, WJ, Indonesia
| | - Azizah Ugusman
- Department of Physiology, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Januar Wibawa Martha
- Department of Cardiology and Vascular Medicine, Faculty of Medicine, Padjadjaran University, Bandung, WJ, Indonesia
| | - Marina Annette Moeliono
- Department of Physical and Rehabilitation Medicine, Dr. Hasan Sadikin General Hospital/Faculty of Medicine, Padjadjaran University, Bandung, WJ, Indonesia
| | - Nur Atik
- Department of Biomedical Sciences, Faculty of Medicine, Padjadjaran University, Bandung, WJ, Indonesia
| |
Collapse
|
24
|
Valenzuela-Barrero C, Núñez-Sánchez FJ, Loturco I, Pareja-Blanco F. Effects of light- vs. heavy-load squat training on velocity, strength, power, and total mechanical work in recreationally trained men and women. Biol Sport 2024; 41:3-11. [PMID: 38524809 PMCID: PMC10955750 DOI: 10.5114/biolsport.2024.129487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 05/15/2023] [Accepted: 06/30/2023] [Indexed: 03/26/2024] Open
Abstract
The purpose of this study was to investigate the effects of light and heavy loads in the squat exercise on kinematics and mechanical variables in recreationally trained men and women. Twenty-two men and sixteen women were assigned to 4 groups: 40% and 80% one-repetition maximum (1RM) male (M40 and M80) and female (F40 and F80). Over 6 weeks, participants performed twice a week the full back-squat (SQ) exercise with initially equated relative volume load (Sets*Repetitions/Set*%1RM). All groups performed different amounts of work (p < 0.05), while relative work (work/1RM) only differed between load groups (p < 0.001). There was no significant Time*Sex*Load interaction. Based on the magnitude of effect sizes: M80 achieved small improvements in the SQ maximum isometric force (MIF; ES = 0.43, 95% CI [0.16, 0.81]); small gains in squat estimated 1RM strength were observed in the 80%-1RM groups (M80: 0.42 [0.18, 0.77]; F80: 0.44 [0.26, 0.76]) and the F40 group (0.42 [0.17, 0.81]); all groups made moderate to large gains in the average velocity attained against heavy loads (> 60%1RM; F40: 1.20 [0.52, 2.27]; F80: 2.20 [1.23, 3.93]; M40: 0.85 [0.29, 1.59]; M80: 1.03 [0.55, 1.77]), as well as small to moderate improvements in the average velocity against light loads (< 60%1RM; F40: 0.49[-0.24, 1.68]; F80: 1.10 [0.06, 3.16]; M40: 0.80 [0.41, 1.35]; M80: 0.93 [0.25, 1.84]). Lastly, only the F40 group showed small improvements in countermovement jump (CMJ) height (ES = 0.65 [0.14, 1.37]). In conclusion, light and heavy loads produced similar strength gains in men and women when initially equated by relative volume load, although the standardized mean differences suggest nuances depending on the sample and task.
Collapse
Affiliation(s)
- Carlos Valenzuela-Barrero
- Physical Performance and Sports Research Center
- Dept of Sport and Informatics, Universidad Pablo de Olavide, Seville, Spain
| | - F Javier Núñez-Sánchez
- Physical Performance and Sports Research Center
- Dept of Sport and Informatics, Universidad Pablo de Olavide, Seville, Spain
| | - Irineu Loturco
- Nucleus of High Performance in Sport (NAR), São Paulo, Brazil
- Dept of Human Movement Sciences, Federal University of São Paulo, São Paulo, Brazil
- University of South Wales, Pontypridd, Wales, United Kingdom
| | - Fernando Pareja-Blanco
- Physical Performance and Sports Research Center
- Dept of Sport and Informatics, Universidad Pablo de Olavide, Seville, Spain
| |
Collapse
|
25
|
Hackett DA, Li J, Wang B, Way KL, Cross T, Tran DL. Acute Effects of Resistance Exercise on Intraocular Pressure in Healthy Adults: A Systematic Review. J Strength Cond Res 2024; 38:394-404. [PMID: 38090981 DOI: 10.1519/jsc.0000000000004668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
ABSTRACT Hackett, DA, Li, J, Wang, B, Way, KL, Cross, T, and Tran, DL. Acute effects of resistance exercise on intraocular pressure in healthy adults: A systematic review. J Strength Cond Res 38(2): 394-404, 2024-Intraocular pressure (IOP) tends to fluctuate during a resistance exercise (RE). This systematic review examines the acute effects of RE on IOP in healthy adults and factors that influence changes in IOP. Five electronic databases were searched using terms related to RE and IOP. A strict inclusion criterion was applied, which included being 55 years or younger with no medical conditions and RE intensity needing to be quantifiable (e.g., based on a maximal effort). Thirty-four studies met the inclusion criteria for this review. Isometric and isotonic contractions produced similar changes in IOP during RE up to 28.7 mm Hg. Exercises that involved larger muscle mass, such as squats and leg press, were found to produce changes in IOP during exercise ranging from 3.1 to 28.7 mm Hg. Smaller changes in IOP during RE were found for exercises engaging less muscle mass (e.g., handgrip and bicep curls). Intraocular pressure was found to increase during RE when lifting heavier loads and with longer exercise durations (e.g., greater repetitions). The Valsalva maneuver (VM) and breath-hold during RE accentuated the change in IOP, with more extreme changes observed with the VM. However, most studies showed that postexercise IOP returned to baseline after approximately 1 minute of recovery. An acute increase in IOP is observed during RE in healthy adults with fluctuations of varying magnitude. Factors that independently increase IOP during RE include exercises involving larger muscle mass, heavy loads, greater set duration, and when the VM or breath-hold is performed.
Collapse
Affiliation(s)
- Daniel A Hackett
- Discipline of Exercise and Sports Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia
| | - Jiuzhang Li
- Discipline of Exercise and Sports Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia
| | - Boliang Wang
- Discipline of Exercise and Sports Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia
| | - Kimberley L Way
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Geelong, Australia
- Division of Cardiac Prevention and Rehabilitation, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Troy Cross
- Discipline of Exercise and Sports Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia
| | - Derek L Tran
- Discipline of Exercise and Sports Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia
- The University of Sydney School of Medicine, Central Clinical School, Camperdown, Australia; and
- Department of Cardiology, Royal Prince Alfred Hospital, Camperdown, Australia
| |
Collapse
|
26
|
Falch HN, Hegdahl Gundersen A, Larsen S, Estifanos Haugen M, van den Tillaar R. Comparison of kinematics and electromyography in the last repetition during different maximum repetition sets in the barbell back squat. PeerJ 2024; 12:e16865. [PMID: 38313010 PMCID: PMC10838531 DOI: 10.7717/peerj.16865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 01/10/2024] [Indexed: 02/06/2024] Open
Abstract
Background The barbell squat is an exercise used to strengthen the lower limbs, with implications for both performance in sports and improving movement during everyday tasks. Although the exercise is being trained across a variety of repetition ranges, the technical requirements may vary, affecting appropriate repetition range for specific training goals. Methods A randomised within-subject design was used to compare kinematics and surface electromyography (EMG) in the lower extremities during different concentric phases (pre-, sticking- and post-sticking region) of the last repetition when performing squats at different repetition maximums (RMs). Thirteen strength-trained men (age: 23.6 ± 1.9 years; height: 181.1 ± 6.5 cm; body mass: 82.2 kg, 1RM: 122.8 ± 16.2, relative strength: 1.5 ± 0.2 x body mass in external load) performed a 1, 3, 6, and 10RM squat, in a randomised order. Results The main findings were that barbell-, ankle-, knee- and hip kinematics were similar across different repetition ranges, except for a smaller trunk lean at 1RM in the pre-sticking region compared to other repetitions and in the sticking region compared to 10RM (p ≤ 0.04). Furthermore, 1RM revealed significantly higher EMG amplitude in the vastus lateralis, gastrocnemius and soleus in the sticking and post-sticking regions when compared to 10RM. It was concluded that 10RM may locally fatigue the vastus lateralis and plantar flexors, explaining the lower EMG amplitude. The observed differences indicate that requirements vary for completing the final repetition of the 10RM compared to the 1RM, an important aspect to consider in training to enhance 1RM strength.
Collapse
Affiliation(s)
- Hallvard Nygaard Falch
- Department for Sports Science and Physical Education, Nord University, Levanger, Trøndelag, Norway
| | | | - Stian Larsen
- Department for Sports Science and Physical Education, Nord University, Levanger, Trøndelag, Norway
| | - Markus Estifanos Haugen
- Department for Sports Science and Physical Education, Nord University, Levanger, Trøndelag, Norway
| | - Roland van den Tillaar
- Department for Sports Science and Physical Education, Nord University, Levanger, Trøndelag, Norway
| |
Collapse
|
27
|
Kintrilis N, Kontaxakis A, Philippou A. EFFECT OF RESISTANCE TRAINING THROUGH IN-PERSON AND TELECONFERENCING SESSIONS IN REHABILITATION OF ACUTE STROKE PATIENTS. JOURNAL OF REHABILITATION MEDICINE. CLINICAL COMMUNICATIONS 2024; 7:18647. [PMID: 38328738 PMCID: PMC10847974 DOI: 10.2340/jrmcc.v7.18647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 12/21/2023] [Indexed: 02/09/2024]
Abstract
Objective To determine whether application of a strength training regimen yields measurable results on stroke survivors and compare different methods for the proposed intervention. Design Patients and Methods Ninety stroke patients were recruited from the neurological clinic of a local third-level clinic. Sixty patients participated in a strength training regimen with trainings taking place 3 times a week for 12 weeks with the use of resistance bands. Thirty of these patients were given face-to-face sessions and 30 patients were given trainings through an on-line platform. The last 30 patients who comprised the control group only followed usual care after the stroke. Results The applied strength regimen had a statistically significant effect on Visual Analog Scale scores of stroke patients who received it (p = 0.009), as well as in the teleconferencing group (p = 0.004). The measured arteriovenous oxygen difference was elevated for stroke patients who received the intervention as a whole (p = 0.007). Patients who were trained in person and the ones who were trained via teleconferencing yielded similar results as evaluated through the VAS index. Discussion and Conclusion Administration of strength training 3 times weekly for 12 weeks to stroke patients yielded measurable results in terms of general function and quality of life.
Collapse
Affiliation(s)
- Nikolaos Kintrilis
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Antonis Kontaxakis
- Physical and Rehabilitation Medicine Department, 414 Military Hospital of Special Diseases, Penteli, Greece
| | - Anastasios Philippou
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| |
Collapse
|
28
|
Coleman M, Burke R, Augustin F, Piñero A, Maldonado J, Fisher JP, Israetel M, Androulakis Korakakis P, Swinton P, Oberlin D, Schoenfeld BJ. Gaining more from doing less? The effects of a one-week deload period during supervised resistance training on muscular adaptations. PeerJ 2024; 12:e16777. [PMID: 38274324 PMCID: PMC10809978 DOI: 10.7717/peerj.16777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 12/18/2023] [Indexed: 01/27/2024] Open
Abstract
Background Based on emerging evidence that brief periods of cessation from resistance training (RT) may re-sensitize muscle to anabolic stimuli, we aimed to investigate the effects of a 1-week deload interval at the midpoint of a 9-week RT program on muscular adaptations in resistance-trained individuals. Methods Thirty-nine young men (n = 29) and women (n = 10) were randomly assigned to 1 of 2 experimental, parallel groups: An experimental group that abstained from RT for 1 week at the midpoint of a 9-week, high-volume RT program (DELOAD) or a traditional training group that performed the same RT program continuously over the study period (TRAD). The lower body routines were directly supervised by the research staff while upper body training was carried out in an unsupervised fashion. Muscle growth outcomes included assessments of muscle thickness along proximal, mid and distal regions of the middle and lateral quadriceps femoris as well as the mid-region of the triceps surae. Adaptions in lower body isometric and dynamic strength, local muscular endurance of the quadriceps, and lower body muscle power were also assessed. Results Results indicated no appreciable differences in increases of lower body muscle size, local endurance, and power between groups. Alternatively, TRAD showed greater improvements in both isometric and dynamic lower body strength compared to DELOAD. Additionally, TRAD showed some slight psychological benefits as assessed by the readiness to train questionnaire over DELOAD. Conclusion In conclusion, our findings suggest that a 1-week deload period at the midpoint of a 9-week RT program appears to negatively influence measures of lower body muscle strength but has no effect on lower body hypertrophy, power or local muscular endurance.
Collapse
Affiliation(s)
- Max Coleman
- Applied Muscle Development Laboratory, City University of New York, Herbert H. Lehman College, Bronx, United States of America
| | - Ryan Burke
- Applied Muscle Development Laboratory, City University of New York, Herbert H. Lehman College, Bronx, United States of America
| | - Francesca Augustin
- Applied Muscle Development Laboratory, City University of New York, Herbert H. Lehman College, Bronx, United States of America
| | - Alec Piñero
- Applied Muscle Development Laboratory, City University of New York, Herbert H. Lehman College, Bronx, United States of America
| | - Jaime Maldonado
- Applied Muscle Development Laboratory, City University of New York, Herbert H. Lehman College, Bronx, United States of America
| | | | - Michael Israetel
- Applied Muscle Development Laboratory, City University of New York, Herbert H. Lehman College, Bronx, United States of America
| | - Patroklos Androulakis Korakakis
- Applied Muscle Development Laboratory, City University of New York, Herbert H. Lehman College, Bronx, United States of America
| | - Paul Swinton
- Robert Gordon Univesity, Aberdeen, United Kingdom
| | - Douglas Oberlin
- Applied Muscle Development Laboratory, City University of New York, Herbert H. Lehman College, Bronx, United States of America
| | - Brad J. Schoenfeld
- Applied Muscle Development Laboratory, City University of New York, Herbert H. Lehman College, Bronx, United States of America
| |
Collapse
|
29
|
Saeterbakken AH, Stien N, Pedersen H, Langer K, Scott S, Michailov ML, Gronhaug G, Baláš J, Solstad TEJ, Andersen V. The Connection Between Resistance Training, Climbing Performance, and Injury Prevention. SPORTS MEDICINE - OPEN 2024; 10:10. [PMID: 38240903 PMCID: PMC10798940 DOI: 10.1186/s40798-024-00677-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 01/03/2024] [Indexed: 01/22/2024]
Abstract
BACKGROUND Climbing is an intricate sport composed of various disciplines, holds, styles, distances between holds, and levels of difficulty. In highly skilled climbers the potential for further strength-specific adaptations to increase performance may be marginal in elite climbers. With an eye on the upcoming 2024 Paris Olympics, more climbers are trying to maximize performance and improve training strategies. The relationships between muscular strength and climbing performance, as well as the role of strength in injury prevention, remain to be fully elucidated. This narrative review seeks to discuss the current literature regarding the effect of resistance training in improving maximal strength, muscle hypertrophy, muscular power, and local muscular endurance on climbing performance, and as a strategy to prevent injuries. MAIN BODY Since sport climbing requires exerting forces against gravity to maintain grip and move the body along the route, it is generally accepted that a climber`s absolute and relative muscular strength are important for climbing performance. Performance characteristics of forearm flexor muscles (hang-time on ledge, force output, rate of force development, and oxidative capacity) discriminate between climbing performance level, climbing styles, and between climbers and non-climbers. Strength of the hand and wrist flexors, shoulders and upper limbs has gained much attention in the scientific literature, and it has been suggested that both general and specific strength training should be part of a climber`s training program. Furthermore, the ability to generate sub-maximal force in different work-rest ratios has proved useful, in examining finger flexor endurance capacity while trying to mimic real-world climbing demands. Importantly, fingers and shoulders are the most frequent injury locations in climbing. Due to the high mechanical stress and load on the finger flexors, fingerboard and campus board training should be limited in lower-graded climbers. Coaches should address, acknowledge, and screen for amenorrhea and disordered eating in climbers. CONCLUSION Structured low-volume high-resistance training, twice per week hanging from small ledges or a fingerboard, is a feasible approach for climbers. The current injury prevention training aims to increase the level of performance through building tolerance to performance-relevant load exposure and promoting this approach in the climbing field.
Collapse
Affiliation(s)
- Atle Hole Saeterbakken
- Department of Sport, Food and Natural Sciences, Faculty of Education, Western Norway University of Applied Sciences, Campus Sogndal, Røyrgata 6, 6856, Sogndal, Norway.
| | - Nicolay Stien
- Department of Sport, Food and Natural Sciences, Faculty of Education, Western Norway University of Applied Sciences, Campus Sogndal, Røyrgata 6, 6856, Sogndal, Norway
| | - Helene Pedersen
- Department of Sport, Food and Natural Sciences, Faculty of Education, Western Norway University of Applied Sciences, Campus Sogndal, Røyrgata 6, 6856, Sogndal, Norway
| | - Kaja Langer
- Department of Human Sciences, Institute of Sports Science, Technical University Darmstadt, Darmstadt, Germany
| | - Suzanne Scott
- School of Anatomy, Faculty of Health and Life Sciences, University of Bristol, Bristol, UK
| | | | - Gudmund Gronhaug
- Department of Sport, Food and Natural Sciences, Faculty of Education, Western Norway University of Applied Sciences, Campus Sogndal, Røyrgata 6, 6856, Sogndal, Norway
| | - Jiří Baláš
- Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Tom Erik Jorung Solstad
- Department of Sport, Food and Natural Sciences, Faculty of Education, Western Norway University of Applied Sciences, Campus Sogndal, Røyrgata 6, 6856, Sogndal, Norway
| | - Vidar Andersen
- Department of Sport, Food and Natural Sciences, Faculty of Education, Western Norway University of Applied Sciences, Campus Sogndal, Røyrgata 6, 6856, Sogndal, Norway
| |
Collapse
|
30
|
Ceccarelli C, Andreani A, Soave A, Salomon M, Maselli F. Use of blood flow restriction for increasing the strength of the ischiocrural muscles in anterior cruciate ligament rehabilitation: A case report. PHYSIOTHERAPY RESEARCH INTERNATIONAL 2024; 29:e2059. [PMID: 37964694 DOI: 10.1002/pri.2059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 10/11/2023] [Accepted: 10/23/2023] [Indexed: 11/16/2023]
Abstract
BACKGROUND The hamstring muscles have a key function in the stability of the knee, limiting the anterior translation of the tibia. Therefore, to better perform rehabilitation after anterior cruciate ligament (ACL) surgery, it is important to develop a specific program based on hamstring strength recovery. It is possible to increase strength and muscle hypertrophy through high load exercises (HL); the recommended load is about 60%-80% of a maximum repetition (MR). Although low-load resistance training (LL) is ineffective at reproducing these values, the use of Blood Flow Restriction (BFR) with LL exercises appears to allow athletes to increase strength and muscle hypertrophy. This could limit functional decline and mitigate muscle atrophy allowing to optimize the recovery path and load management in post-operative patients. Recent scientific evidence, as far as the increasingly frequent use of BFR in rehabilitation and sports rehabilitation is concerned, suggests that these devices could represent one of the most significant innovations in the physiotherapy field. The aim of this study was to increase the strength of the hamstrings in the early phases of ACL rehabilitation with an LL-BFR training protocol for speeding up the development of adequate muscle strength. CASE DESCRIPTIONS The patient, a 25-year-old male professional footballer, suffered from ACL injury during a football match, and after three months, he underwent a reconstruction ACL surgery with medial Hamstring tendon autograft. The athlete engaged a pre-operative program to restore a full active and passive knee range of motion and increase muscular strength. The first rehabilitation phase was supported by the adoption of BFR for hamstring strengthening, starting from the sixth week post-surgery (T0). A complete assessment of posterior hamstring muscles was performed through a hand-held dynamometer and load detection platforms. Three different types of exercises, focusing on the hamstring muscles, were chosen. Two further assessments were performed over time (T1 ant T2), highlighting different changes that occurred. RESULTS Interesting results showed a significant increase between T0 and T1 for all the assessed outcomes; in this case an average increase in strength of 59.87% between the beginning and the end of 4 weeks rehabilitation protocol was obtained in the first interval (T0-T1), while only 25.26% resulted in the second interval (T1-T2). However, the collected data should be considered with caution due to some limitations: the single experience of a single patient can hardly be generalized. Moreover, the reliance on isometric measurement of maximal strength and the absence of a direct strength measurement of the hamstrings during squat remain questionable. CONCLUSION The final results suggest the capacity of the LL-BFR exercises to recreate a condition of a high intensity muscular effort with respect to load management, especially after surgery. This highlights the need to further investigate BFR adoption as it allows the patients to speed up their rehabilitation goals in developing adequate muscle strength.
Collapse
Affiliation(s)
| | - Alessandro Andreani
- Department of Medicine and Health Science "Vincenzo Tiberio", University of Molise C/daTappino c/o Cardarelli Hospital, Campobasso, Italy
| | | | - Mattia Salomon
- Department of Clinical Sciences and Translational Medicine, University of Roma "Tor Vergata" c/o Medicine and Surgery School, Rome, Italy
- Department of Human Neurosciences, University of Roma "Sapienza Roma", Rome, Italy
| | - Filippo Maselli
- Department of Human Neurosciences, University of Roma "Sapienza Roma", Rome, Italy
| |
Collapse
|
31
|
Ylinen J, Pasanen T, Heinonen A, Kivistö H, Kautiainen H, Multanen J. Trunk muscle activation of core stabilization exercises in subjects with and without chronic low back pain. J Back Musculoskelet Rehabil 2024; 37:897-908. [PMID: 38250755 DOI: 10.3233/bmr-230043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
BACKGROUND Weakness and atrophy in trunk muscles have been associated with chronic low back pain (CLBP). OBJECTIVE This study aimed to identify isometric exercises resulting the highest trunk muscle activity for individuals with and without CLBP. METHODS Fourteen males with CLBP and 15 healthy age-matched healthy subjects were recruited for this study. Muscle activity during maximal voluntary isometric contraction (MVIC) was measured for a comparative reference with surface electromyography (sEMG) from six trunk muscles. Thereafter maximum EMG amplitude values were measured during eleven trunk stability exercises. The maximal EMG activity in each exercise relative to the MVICs was analyzed using generalizing estimating equations (GEE) models with the unstructured correlation structure. RESULTS The GEE models showed statistically significant differences in muscle activity between exercises within both groups (p< 0.001), with no significant differences between groups (p> 0.05). The highest muscle activity was achieved with the hip flexion machine for multifidus, side pull with a resistance band for lumbar extensors, side and single-arm cable pull exercises for thoracic extensors, rotary plank and the hip flexion machine for abdominal. CONCLUSION This study found five isometric trunk exercises that exhibited highest muscle activity depending on muscle tested, with no significant difference between individuals with and without CLBP.
Collapse
Affiliation(s)
- Jari Ylinen
- Department of Physical Medicine and Rehabilitation, NOVA, Central Hospital of Central Finland, Jyväskylä, Finland
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Tero Pasanen
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Ari Heinonen
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Heikki Kivistö
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Hannu Kautiainen
- Unit of Primary Health Care, Kuopio University Hospital, Kuopio, Finland
| | - Juhani Multanen
- Department of Physical Medicine and Rehabilitation, NOVA, Central Hospital of Central Finland, Jyväskylä, Finland
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| |
Collapse
|
32
|
Serighelli F, De Oliveira Silva D, Reginato GA, Pocai BL, Vieira DD, Carvalho ARD. Can photobiomodulation improve quadriceps strength and endurance outcomes in asymptomatic adults? A double-blind randomized controlled trial. J Bodyw Mov Ther 2024; 37:94-100. [PMID: 38432848 DOI: 10.1016/j.jbmt.2023.11.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 03/05/2024]
Abstract
AIM To explore the effect of photobiomodulation on quadriceps strength and endurance torques in asymptomatic adults. METHODS Twenty-eight asymptomatic adults were randomized to one of two interventions: photobiomodulation (n = 14) or sham (n = 14). Quadriceps strength was evaluated by maximum voluntary isometric contraction test (60°) and endurance by an elastic resistance in multiple-set knee extension/flexion repetitions using a traction dynamometer. The outcomes were measured at three time points: pre-baseline; baseline and; final assessment. The photobiomodulation was applied to the quadriceps and triceps surae muscles of each participant's dominant lower limb, using a cluster with 1 infrared laser diode and 3 led amber of 170 mW for 240 s over four consecutive days. The sham group went through the same procedures, but the equipment was off, and patients and assessors were blinded to the intervention. Reliability and minimal detectable change of the measures were obtained from the pre-baseline and baseline time points. Differences between interventions were tested by an analysis of covariance. RESULTS AND DISCUSSION There was no difference between photobiomodulation compared to sham in maximum isometric torque (mean difference (95% CI) = 0.008 (-0.29 to 0.31) and endurance torques (mean difference (95% CI) = 0.04 (-0.03 to 0.12). The mean difference was lower than the minimal detectable change for the maximum isometric torque (1.02 Nm.kg-1) and endurance torque (0.49 Nm.kg-1). CONCLUSION Photobiomodulation does not improve quadriceps strength and endurance outcomes in asymptomatic adults.
Collapse
Affiliation(s)
- Fernanda Serighelli
- UNIOESTE - Universidade Estadual do Oeste do Paraná, CCBS - Centro de Ciências Biológicas e da Saúde, Cascavel, Paraná, Brazil; La Trobe University, La Trobe Sport and Exercise Medicine Research Centre, Melbourne, Victoria, Australia.
| | - Danilo De Oliveira Silva
- La Trobe University, La Trobe Sport and Exercise Medicine Research Centre, Melbourne, Victoria, Australia
| | - Giovana Aita Reginato
- UNIOESTE - Universidade Estadual do Oeste do Paraná, CCBS - Centro de Ciências Biológicas e da Saúde, Cascavel, Paraná, Brazil
| | - Bruna Lehmkuhl Pocai
- UNIOESTE - Universidade Estadual do Oeste do Paraná, CCBS - Centro de Ciências Biológicas e da Saúde, Cascavel, Paraná, Brazil
| | - Dennis Damian Vieira
- UNIOESTE - Universidade Estadual do Oeste do Paraná, CCBS - Centro de Ciências Biológicas e da Saúde, Cascavel, Paraná, Brazil
| | - Alberito Rodrigo de Carvalho
- UNIOESTE - Universidade Estadual do Oeste do Paraná, CCBS - Centro de Ciências Biológicas e da Saúde, Cascavel, Paraná, Brazil
| |
Collapse
|
33
|
Tang WJ, Gu B, Montalvo S, Dunaway Young S, Parker DM, de Monts C, Ataide P, Ni Ghiollagain N, Wheeler MT, Tesi Rocha C, Christle JW, He Z, Day JW, Duong T. Assessing the Assisted Six-Minute Cycling Test as a Measure of Endurance in Non-Ambulatory Patients with Spinal Muscular Atrophy (SMA). J Clin Med 2023; 12:7582. [PMID: 38137651 PMCID: PMC10743820 DOI: 10.3390/jcm12247582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 11/16/2023] [Accepted: 12/06/2023] [Indexed: 12/24/2023] Open
Abstract
Assessing endurance in non-ambulatory individuals with Spinal Muscular Atrophy (SMA) has been challenging due to limited evaluation tools. The Assisted 6-Minute Cycling Test (A6MCT) is an upper limb ergometer assessment used in other neurologic disorders to measure endurance. To study the performance of the A6MCT in the non-ambulatory SMA population, prospective data was collected on 38 individuals with SMA (13 sitters; 25 non-sitters), aged 5 to 74 years (mean = 30.3; SD = 14.1). The clinical measures used were A6MCT, Revised Upper Limb Module (RULM), Adapted Test of Neuromuscular Disorders (ATEND), and Egen Klassifikation Scale 2 (EK2). Perceived fatigue was assessed using the Fatigue Severity Scale (FSS), and effort was assessed using the Rate of Perceived Exertion (RPE). Data were analyzed for: (1) Feasibility, (2) Clinical discrimination, and (3) Associations between A6MCT with clinical characteristics and outcomes. Results showed the A6MCT was feasible for 95% of the tested subjects, discriminated between functional groups (p = 0.0086), and was significantly associated with results obtained from RULM, ATEND, EK2, and Brooke (p < 0.0001; p = 0.029; p < 0.001; p = 0.005). These findings indicate the A6MCT's potential to evaluate muscular endurance in non-ambulatory SMA individuals, complementing clinician-rated assessments. Nevertheless, further validation with a larger dataset is needed for broader application.
Collapse
Affiliation(s)
- Whitney J. Tang
- Department of Neurology and Clinical Neurosciences, Stanford University, Palo Alto, CA 94305, USA; (W.J.T.); (S.D.Y.); (C.T.R.); (Z.H.); (J.W.D.)
| | - Bo Gu
- Department of Neurology and Clinical Neurosciences, Stanford University, Palo Alto, CA 94305, USA; (W.J.T.); (S.D.Y.); (C.T.R.); (Z.H.); (J.W.D.)
| | - Samuel Montalvo
- Department of Medicine, Division of Cardiovascular Medicine, Stanford University, Palo Alto, CA 94305, USA; (S.M.); (J.W.C.)
| | - Sally Dunaway Young
- Department of Neurology and Clinical Neurosciences, Stanford University, Palo Alto, CA 94305, USA; (W.J.T.); (S.D.Y.); (C.T.R.); (Z.H.); (J.W.D.)
| | - Dana M. Parker
- Department of Neurology and Clinical Neurosciences, Stanford University, Palo Alto, CA 94305, USA; (W.J.T.); (S.D.Y.); (C.T.R.); (Z.H.); (J.W.D.)
| | - Constance de Monts
- Department of Neurology and Clinical Neurosciences, Stanford University, Palo Alto, CA 94305, USA; (W.J.T.); (S.D.Y.); (C.T.R.); (Z.H.); (J.W.D.)
| | - Paxton Ataide
- Department of Neurology and Clinical Neurosciences, Stanford University, Palo Alto, CA 94305, USA; (W.J.T.); (S.D.Y.); (C.T.R.); (Z.H.); (J.W.D.)
| | - Noirin Ni Ghiollagain
- Department of Neurology and Clinical Neurosciences, Stanford University, Palo Alto, CA 94305, USA; (W.J.T.); (S.D.Y.); (C.T.R.); (Z.H.); (J.W.D.)
| | - Matthew T. Wheeler
- Department of Medicine, Division of Cardiovascular Medicine, Stanford University, Palo Alto, CA 94305, USA; (S.M.); (J.W.C.)
| | - Carolina Tesi Rocha
- Department of Neurology and Clinical Neurosciences, Stanford University, Palo Alto, CA 94305, USA; (W.J.T.); (S.D.Y.); (C.T.R.); (Z.H.); (J.W.D.)
| | - Jeffrey W. Christle
- Department of Medicine, Division of Cardiovascular Medicine, Stanford University, Palo Alto, CA 94305, USA; (S.M.); (J.W.C.)
| | - Zihuai He
- Department of Neurology and Clinical Neurosciences, Stanford University, Palo Alto, CA 94305, USA; (W.J.T.); (S.D.Y.); (C.T.R.); (Z.H.); (J.W.D.)
| | - John W. Day
- Department of Neurology and Clinical Neurosciences, Stanford University, Palo Alto, CA 94305, USA; (W.J.T.); (S.D.Y.); (C.T.R.); (Z.H.); (J.W.D.)
| | - Tina Duong
- Department of Neurology and Clinical Neurosciences, Stanford University, Palo Alto, CA 94305, USA; (W.J.T.); (S.D.Y.); (C.T.R.); (Z.H.); (J.W.D.)
| |
Collapse
|
34
|
Anyadike-Danes K, Donath L, Kiely J. Coaches' Perceptions of Factors Driving Training Adaptation: An International Survey. Sports Med 2023; 53:2505-2512. [PMID: 37552460 PMCID: PMC10687123 DOI: 10.1007/s40279-023-01894-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/12/2023] [Indexed: 08/09/2023]
Abstract
OBJECTIVE We surveyed coaches' views on topics related to the training process to elucidate whether their opinions are aligned with the current literature. Here the results for a sub-set of questions regarding factors affecting the training adaptation process are presented and discussed. METHODS 106 coaches [age range 18-65 + years, 31% 15 + years coaching, 58% individual-events/sports and 32% international level] from a number of countries completed a novel cross-sectional online survey about the planning of training and the training process. RESULTS Only 28% of participants indicated that physical training was the most important factor in determining sport performance; whereas 99% indicated non-physical factors influence physical training response. The top five factors in modifying an athlete's ability to physically adapt to a training plan, as rated 'absolutely essential', were 'coach-athlete relationship' (56%), 'life stress' (41%), 'athletes' belief in the plan' (37%), 'psychological and emotional stress' (35%) and 'physical training' (33%). CONCLUSIONS Amongst coaches surveyed less than a third rated physical training as the most important factor in determining sports performance. Non-physical factors were acknowledged by the majority to exert an influence on physical training response and adaptation, despite the lack of discussion in training research, though there was no consensus on the relative importance of each individual factor. We echo previous sentiments that coaches need to be engaged in the research process. If training research continues as present the field runs the risk of not only becoming detached but increasingly irrelevant to those it is trying to help.
Collapse
Affiliation(s)
- Kechi Anyadike-Danes
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany.
| | - Lars Donath
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany
| | - John Kiely
- Faculty of Education and Health Sciences, University of Limerick, Limerick, Ireland
| |
Collapse
|
35
|
Urbański R, Biel P, Kot S, Perenc D, Aschenbrenner P, Stastny P, Krzysztofik M. Impact of active intra-complex rest intervals on post-back squat versus hip thrust jumping potentiation. Sci Rep 2023; 13:19593. [PMID: 37950054 PMCID: PMC10638422 DOI: 10.1038/s41598-023-47042-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 11/08/2023] [Indexed: 11/12/2023] Open
Abstract
This study investigated the impact of active rest intervals within a lower body complex training session on post-activation performance enhancement (PAPE) response in amateur soccer players. Twelve soccer players took part in four different experimental conditions. These sessions included 2 sets of lower body complex-paired exercises, each involving 3 repetitions of either back squats or hip thrusts at 90% one-repetition maximum (1RM) as a conditioning activity paired with a broad jump and countermovement jump. Between those exercises in active intra-complex rest interval conditions, participants were performing 8 repetitions of bench press at 75%1RM or, in passive intra-complex rest interval conditions, rested while seated. A significant main effect of a set to increase broad jump length (p = 0.002), countermovement jump height (p = 0.002), and modified reactive strength index (p = 0.005) was revealed, without any significant differences between conditions. Post-hoc comparisons showed a significant increase in broad jump length from baseline to Set-2 (231 ± 13 vs. 234 ± 13 cm; p = 0.003; ES = 0.22). On the other hand, countermovement jump height and modified reactive strength index significantly increased from baseline to Set-1 (34.4 ± 3.6 vs. 35.6 ± 3.9 cm; p = 0.027; ES = 0.31 and 0.4 ± 0.05 vs. 0.45 ± 0.09; p = 0.005; ES = 0.66). Results of this study showed that to sustain a high training density, sports practitioners may incorporate upper body exercises within the intra-complex rest interval during lower limb complex training sessions and still elicit a significant PAPE effect.
Collapse
Affiliation(s)
- Robert Urbański
- Department of Biomechanics and Sports Engineering, Gdansk University of Physical Education and Sport, Gdańsk, Poland
| | - Piotr Biel
- Department of Sport and Physical Education, AGH University of Science and Technology, Krakow, Poland
| | - Sebastian Kot
- Nutrition and Sports Performance Research Group, The Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065, Katowice, Poland
| | - Dawid Perenc
- Nutrition and Sports Performance Research Group, The Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065, Katowice, Poland
| | - Piotr Aschenbrenner
- Department of Biomechanics and Sports Engineering, Gdansk University of Physical Education and Sport, Gdańsk, Poland
| | - Petr Stastny
- Department of Sport Games, Faculty of Physical Education and Sport, Charles University in Prague, Prague, Czech Republic
| | - Michał Krzysztofik
- Nutrition and Sports Performance Research Group, The Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065, Katowice, Poland.
- Department of Sport Games, Faculty of Physical Education and Sport, Charles University in Prague, Prague, Czech Republic.
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, Poland, Mikołowska 72A str., 40-065, Katowice, Poland.
| |
Collapse
|
36
|
Riener R, Rabezzana L, Zimmermann Y. Do robots outperform humans in human-centered domains? Front Robot AI 2023; 10:1223946. [PMID: 38023587 PMCID: PMC10661952 DOI: 10.3389/frobt.2023.1223946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 10/09/2023] [Indexed: 12/01/2023] Open
Abstract
The incessant progress of robotic technology and rationalization of human manpower induces high expectations in society, but also resentment and even fear. In this paper, we present a quantitative normalized comparison of performance, to shine a light onto the pressing question, "How close is the current state of humanoid robotics to outperforming humans in their typical functions (e.g., locomotion, manipulation), and their underlying structures (e.g., actuators/muscles) in human-centered domains?" This is the most comprehensive comparison of the literature so far. Most state-of-the-art robotic structures required for visual, tactile, or vestibular perception outperform human structures at the cost of slightly higher mass and volume. Electromagnetic and fluidic actuation outperform human muscles w.r.t. speed, endurance, force density, and power density, excluding components for energy storage and conversion. Artificial joints and links can compete with the human skeleton. In contrast, the comparison of locomotion functions shows that robots are trailing behind in energy efficiency, operational time, and transportation costs. Robots are capable of obstacle negotiation, object manipulation, swimming, playing soccer, or vehicle operation. Despite the impressive advances of humanoid robots in the last two decades, current robots are not yet reaching the dexterity and versatility to cope with more complex manipulation and locomotion tasks (e.g., in confined spaces). We conclude that state-of-the-art humanoid robotics is far from matching the dexterity and versatility of human beings. Despite the outperforming technical structures, robot functions are inferior to human ones, even with tethered robots that could place heavy auxiliary components off-board. The persistent advances in robotics let us anticipate the diminishing of the gap.
Collapse
Affiliation(s)
- Robert Riener
- Sensory-Motor Systems Laboratory, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
- Paraplegic Center, University Hospital Balgrist, University of Zurich, Zurich, Switzerland
| | - Luca Rabezzana
- Sensory-Motor Systems Laboratory, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
| | - Yves Zimmermann
- Sensory-Motor Systems Laboratory, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
- Robotic-Systems Laboratory, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
| |
Collapse
|
37
|
Lee MC, Ho CS, Hsu YJ, Wu MF, Huang CC. Effect of 8-week frequency-specific electrical muscle stimulation combined with resistance exercise training on muscle mass, strength, and body composition in men and women: a feasibility and safety study. PeerJ 2023; 11:e16303. [PMID: 37868059 PMCID: PMC10586320 DOI: 10.7717/peerj.16303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 09/26/2023] [Indexed: 10/24/2023] Open
Abstract
In recent years, electrical muscle stimulation (EMS) devices have been developed as a complementary training technique that is novel, attractive, and time-saving for physical fitness and rehabilitation. While it is known that EMS training can improve muscle mass and strength, most studies have focused on the elderly or specific patient populations. The aim of this study was to investigate the effects of frequency-specific EMS combined with resistance exercise training for 8 weeks on muscle mass, strength, power, body composition, and parameters related to exercise fatigue. Additionally, we aimed to evaluate the feasibility and safety of EMS as an exercise aid to improve body composition. We recruited 14 male and 14 female subjects who were randomly assigned to two groups with gender parity (seven male and seven female/group): (1) no EMS group (age: 21.6 ± 1.7; height: 168.8 ± 11.8 cm; weight: 64.2 ± 14.4 kg) and (2) daily EMS group (age: 21.8 ± 2.0; height: 167.8 ± 9.9 cm; weight: 68.5 ± 15.5 kg). The two groups of subjects were very similar with no significant difference. Blood biochemical routine analysis was performed every 4 weeks from pre-intervention to post-intervention, and body composition, muscle strength, and explosive power were evaluated 8 weeks before and after the intervention. We also performed an exercise challenge analysis of fatigue biochemical indicators after 8 weeks of intervention. Our results showed that resistance exercise training combined with daily EMS significantly improved muscle mass (p = 0.002) and strength (left, p = 0.007; right, p = 0.002) and significantly reduced body fat (p < 0.001) than the no EMS group. However, there was no significant advantage for biochemical parameters of fatigue and lower body power. In summary, our study demonstrates that 8 weeks of continuous resistance training combined with daily upper body, lower body, and abdominal EMS training can significantly improve muscle mass and upper body muscle strength performance, as well as significantly reduce body fat percentage in healthy subjects.
Collapse
Affiliation(s)
- Mon-Chien Lee
- Graduate Institute of Sports Science, National Taiwan Sport University, Taoyuan, Taiwan
- Center for General Education, Taipei Medical University, Taipei, Taiwan
| | - Chin-Shan Ho
- Graduate Institute of Sports Science, National Taiwan Sport University, Taoyuan, Taiwan
| | - Yi-Ju Hsu
- Graduate Institute of Sports Science, National Taiwan Sport University, Taoyuan, Taiwan
| | - Ming-Fang Wu
- Graduate Institute of Sports Science, National Taiwan Sport University, Taoyuan, Taiwan
| | - Chi-Chang Huang
- Graduate Institute of Sports Science, National Taiwan Sport University, Taoyuan, Taiwan
- Tajen University, Pingtung, Taiwan
| |
Collapse
|
38
|
Moghadam BT, Shirvani H, Ramirez-Campillo R, Martín EBS, Paydar Ardakani SM, Abdolmohamadi A, Bazgir B. Effects of different cluster-set rest intervals during plyometric-jump training on measures of physical fitness: A randomized trial. PLoS One 2023; 18:e0285062. [PMID: 37792709 PMCID: PMC10550132 DOI: 10.1371/journal.pone.0285062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 08/11/2023] [Indexed: 10/06/2023] Open
Abstract
The optimal intra-set rest for cluster sets (CLS) during plyometric-jump training (PJT) to improve physical fitness remains unclear. The objective of this quasi-experimental study was to compare the effects of PJT with traditional (TRS) vs. CLS structures, using different intra-set rests, on the physical fitness of healthy participants. Forty-seven recreationally active young men performed 3-5 sets of 10-12 repetitions of upper- and lower-body PJT exercises twice a week for six weeks using different set configurations: TRS group (no intra-set rest), and the CLS10, CLS20 and CLS30 groups with 10, 20 and 30 s of intra-set rest, respectively, while the total rest period was equated. Pretest-posttest measurements were carried out 48 h before and after the intervention and the rating of fatigue (ROF) was also assessed using a numerical scale (0-10 points) 20 min after the first and last (i.e., 12th) session. There was no significant difference in the mean energy intake between groups (p > 0.05). The repeated measures ANOVA revealed that all groups showed similar improvements (p < 0.05) in body mass, body mass index, fat-free mass, one repetition maximum (dynamic strength) and repetitions to failure (muscular endurance) in back squat and chest press, handgrip strength, standing long jump, 20 m sprint, 9-m shuttle run (change of direction speed), and ROF. Of note, the ROF was lower for the CLS20 and CLS30 groups, independent from the training effect. The physical fitness of recreationally active young men improved after 6 weeks of PJT involving intra-set rest intervals of 0 s, 10 s, 20 s, or 30 s. However, an intra-set rest of 20 s and 30 s seems to induce lower exercise-induced fatigue perception.
Collapse
Affiliation(s)
- Behzad Taaty Moghadam
- Exercise Physiology Research Center, Lifestyle Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Hossein Shirvani
- Exercise Physiology Research Center, Lifestyle Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Rodrigo Ramirez-Campillo
- Exercise and Rehabilitation Sciences Institute, School of Physical Therapy, Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago, Chile
| | - Eduardo Báez-San Martín
- Sports Coach Career, School of Education, Universidad Viña del Mar, Viña del Mar, Chile
- Department of Sport Sciences, Faculty of Physical Activity and Sport Sciences, Universidad de Playa Ancha, Valparaíso, Chile
| | | | | | - Behzad Bazgir
- Exercise Physiology Research Center, Lifestyle Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| |
Collapse
|
39
|
Wing C, Hart NH, Ma'ayah F, Nosaka K. Factors Affecting Physical and Technical Performance in Australian Football. J Strength Cond Res 2023; 37:1844-1851. [PMID: 37616538 DOI: 10.1519/jsc.0000000000004454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/16/2022] [Indexed: 08/26/2023]
Abstract
ABSTRACT Wing, C, Hart, NH, Ma'ayah, F, and Nosaka, K. Factors affecting physical and technical performance in Australian football. J Strength Cond Res 37(9): 1844-1851, 2023-This study assessed player (i.e., lower-body strength and power and aerobic fitness) and environmental (e.g., venue) factors and their effects on the physical (e.g., distance) and technical (e.g., kicks) demands of Australian football (AF). Relative distance, high-speed running (HSR), and acceleration efforts for 19 matches by 33 players in a West AF League team were analyzed from global positioning system data split into periods of successful offense and defense and maximum ball in play (BiP) periods, as well as technical actions. Lower-body strength and power, and aerobic fitness were evaluated using a one-repetition trap-bar deadlift, countermovement jump, 2-km time trial, and Yo-Yo intermittent fitness test, respectively. In matches played at home, distance (p < 0.001, ES = 0.39) and HSR (p < 0.001, ES = 0.34) were significantly reduced during successful defense. In addition, tackle rate was significantly increased (p = 0.003, ES = 0.16) during successful defense when playing at home. Trap-bar deadlift relative to mass significantly increased relative distance (p = 0.004, ES = 0.51) and HSR (p = 0.029, ES = 0.40) in successful offense. In successful defense, superior time trial performance significantly increased relative distance (p < 0.001, ES = 0.58), HSR (p < 0.001, ES = 0.59), and acceleration efforts (p = 0.017, ES = 0.44), while relative distance (p < 0.001, ES = 0.62) and HSR (p = 0.004, ES = 0.52) were also increased during maximum BiP periods. The results demonstrate that player factors have the largest effect on the physical and technical performance of AF players.
Collapse
Affiliation(s)
- Christopher Wing
- Centre for Human Performance, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia
| | - Nicolas H Hart
- Institute for Health Research, University of Notre Dame Australia, Fremantle, Australia
- College of Nursing and Health Science, Caring Futures Institute, Flinders University, Adelaide, Australia
- Exercise Medicine Research Institute, Edith Cowan University, Joondalup, Australia; and
| | - Fadi Ma'ayah
- Centre for Human Performance, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia
- School of Education, Curtin University, Bentley, Australia
| | - Kazunori Nosaka
- Centre for Human Performance, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia
- Exercise Medicine Research Institute, Edith Cowan University, Joondalup, Australia; and
| |
Collapse
|
40
|
Zouita A, Darragi M, Bousselmi M, Sghaeir Z, Clark CCT, Hackney AC, Granacher U, Zouhal H. The Effects of Resistance Training on Muscular Fitness, Muscle Morphology, and Body Composition in Elite Female Athletes: A Systematic Review. Sports Med 2023; 53:1709-1735. [PMID: 37289331 PMCID: PMC10432341 DOI: 10.1007/s40279-023-01859-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/27/2023] [Indexed: 06/09/2023]
Abstract
BACKGROUND Well programmed strength and conditioning training is an indispensable part of the long-term training process for athletes in individual and team sports to improve performance and prevent injuries. Yet, there is a limited number of studies available that examine the effects of resistance training (RT) on muscular fitness and physiological adaptations in elite female athletes. OBJECTIVES This systematic review aimed to summarize recent evidence on the long-term effects of RT or combinations of RT with other strength-dominated exercise types on muscular fitness, muscle morphology, and body composition in female elite athletes. MATERIALS AND METHODS A systematic literature search was conducted in nine electronic databases (Academic Search Elite, CINAHL, ERIC, Open Access Theses and Dissertations, Open Dissertations, PsycINFO, PubMed/MEDLINE, Scopus, and SPORTDiscus) from inception until March 2022. Key search terms from the MeSH database such as RT and strength training were included and combined using the operators "AND," "OR," and "NOT". The search syntax initially identified 181 records. After screening for titles, abstracts, and full texts, 33 studies remained that examined the long-term effects of RT or combinations of RT with other strength-dominated exercise types on muscular fitness, muscle morphology, and body composition in female elite athletes. RESULTS Twenty-four studies used single-mode RT or plyometric training and nine studies investigated the effects of combined training programs such as resistance with plyometric or agility training, resistance and speed training, and resistance and power training. The training duration lasted at least 4 weeks, but most studies used ~ 12 weeks. Studies were generally classified as 'high-quality' with a mean PEDro score of 6.8 (median 7). Irrespective of the type or combination of RT with other strength-dominated exercise regimens (type of exercise, exercise duration, or intensity), 24 out of 33 studies reported increases in muscle power (e.g., maximal and mean power; effect size [ES]: 0.23 < Cohen's d < 1.83, small to large), strength (e.g., one-repetition-maximum [1RM]; ES: 0.15 < d < 6.80, small to very large), speed (e.g., sprint times; ES: 0.01 < d < 1.26, small to large), and jump performance (e.g., countermovement/squat jump; ES: 0.02 < d < 1.04, small to large). The nine studies that examined the effects of combined training showed significant increases on maximal strength (ES: 0.08 < d < 2.41, small to very large), muscle power (ES: 0.08 < d < 2.41, small to very large), jump and sprint performance (ES: 0.08 < d < 2.41, small to very large). Four out of six studies observed no changes in body mass or percentage of body fat after resistance or plyometric training or combined training (ES: 0.026 < d < 0.492, small to medium). Five out of six studies observed significant changes in muscle morphology (e.g., muscle thickness, muscle fiber cross-sectional area; ES: 0.23 < d < 3.21, small to very large). However, one study did not find any changes in muscle morphology (i.e., muscle thickness, pennation angle; ES: 0.1 < d < 0.19, small). CONCLUSION Findings from this systematic review suggest that RT or combined RT with other strength-dominated exercise types leads to significant increases in measures of muscle power, strength, speed, and jump performance in elite female athletes. However, the optimal dosage of programming parameters such as training intensity and duration necessary to induce large effects in measures of muscular fitness and their physiological adaptations remain to be resolved in female elite athletes.
Collapse
Affiliation(s)
- Amira Zouita
- Higher Institute of Sport and Physical Education of Ksar-Said, Research Unit "Sports Performance, Health & Society" (UR17JS01), University of Manouba, Manouba, Tunisia
| | - Manel Darragi
- Higher Institute of Sport and Physical Education of Ksar-Said, Research Unit "Sports Performance, Health & Society" (UR17JS01), University of Manouba, Manouba, Tunisia
| | - Mariem Bousselmi
- Higher Institute of Sport and Physical Education of Ksar-Said, Research Unit "Sports Performance, Health & Society" (UR17JS01), University of Manouba, Manouba, Tunisia
| | - Zouita Sghaeir
- Higher Institute of Sport and Physical Education of Ksar-Said, University of Manouba, Manouba, Tunisia
| | - Cain C T Clark
- Centre for Intelligent Healthcare, Coventry University, Coventry, UK
| | - Anthony C Hackney
- Department of Exercise & Sport Science, University of North Carolina, Chapel Hill, NC, USA
| | - Urs Granacher
- Department of Sport and Sport Science, Exercise and Human Movement Science, University of Freiburg, Freiburg, Germany.
| | - Hassane Zouhal
- Univ Rennes, M2S (Laboratoire Mouvement, Sport, Santé), EA 1274, 35000, Rennes, France.
| |
Collapse
|
41
|
Haugen ME, Vårvik FT, Larsen S, Haugen AS, van den Tillaar R, Bjørnsen T. Effect of free-weight vs. machine-based strength training on maximal strength, hypertrophy and jump performance - a systematic review and meta-analysis. BMC Sports Sci Med Rehabil 2023; 15:103. [PMID: 37582807 PMCID: PMC10426227 DOI: 10.1186/s13102-023-00713-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 08/02/2023] [Indexed: 08/17/2023]
Abstract
BACKGROUND The effectiveness of strength training with free-weight vs. machine equipment is heavily debated. Thus, the purpose of this meta-analysis was to summarize the data on the effect of free-weight versus machine-based strength training on maximal strength, jump height and hypertrophy. METHODS The review was conducted in accordance with the preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines, and the systematic search of literature was conducted up to January 1st, 2023. Studies that directly compared free-weight vs. machine-based strength training for a minimum of 6 weeks in adults (18-60 yrs.) were included. RESULTS Thirteen studies (outcomes: maximal strength [n = 12], jump performance [n = 5], muscle hypertrophy [n = 5]) with a total sample of 1016 participants (789 men, 219 women) were included. Strength in free-weight tests increased significantly more with free-weight training than with machines (SMD: -0.210, CI: -0.391, -0.029, p = 0.023), while strength in machine-based tests tended to increase more with machine training than with free-weights (SMD: 0.291, CI: -0.017, 0.600, p = 0.064). However, no differences were found between modalities in direct comparison (free-weight strength vs. machine strength) for dynamic strength (SMD: 0.084, CI: -0.106, 0.273, p = 0.387), isometric strength (SMD: -0.079, CI: -0.432, 0.273, p = 0.660), countermovement jump (SMD: -0.209, CI: -0.597, 0.179, p = 0.290) and hypertrophy (SMD: -0.055, CI: -0.397, 0.287, p = 0.751). CONCLUSION No differences were detected in the direct comparison of strength, jump performance and muscle hypertrophy. Current body of evidence indicates that strength changes are specific to the training modality, and the choice between free-weights and machines are down to individual preferences and goals.
Collapse
Affiliation(s)
- Markus E Haugen
- Department of Sport Sciences and Physical Education, Nord University, Levanger, Norway.
| | - Fredrik T Vårvik
- Department of Sport Science and Physical Education, Faculty of Health and Sport Sciences, University of Agder, Kristiansand, Norway
- Strength and Power consultant at the Norwegian Olympic and Paralympic Committee and Confederation of Sports, Oslo, Norway
- Norwegian Olympic and Paralympic Committee and Confederation of Sports, Oslo, Norway
| | - Stian Larsen
- Department of Sport Sciences and Physical Education, Nord University, Levanger, Norway
| | - Arvid S Haugen
- Department of Anaesthesia and Intensive Care, Haukeland University Hospital, Bergen, Norway
- Department of Nursing and Health Promotion Acute and Critical Illness, Faculty of Health Sciences, OsloMet - Oslo Metropolitan University, Oslo, Norway
| | | | - Thomas Bjørnsen
- Department of Sport Science and Physical Education, Faculty of Health and Sport Sciences, University of Agder, Kristiansand, Norway
- Strength and Power consultant at the Norwegian Olympic and Paralympic Committee and Confederation of Sports, Oslo, Norway
- Norwegian Olympic and Paralympic Committee and Confederation of Sports, Oslo, Norway
| |
Collapse
|
42
|
Lindblom H, Waldén M, Hägglund M. Adherence to Injury Prevention Exercise Programmes in Amateur Adolescent and Adult Football: A Detailed Description of Programme Use from a Randomised Study. SPORTS MEDICINE - OPEN 2023; 9:57. [PMID: 37452894 DOI: 10.1186/s40798-023-00608-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 07/04/2023] [Indexed: 07/18/2023]
Abstract
BACKGROUND Injury prevention exercise programmes (IPEPs) efficaciously reduce injuries. However, it is challenging to achieve sufficient adherence across a season. The main aim was to describe adherence to IPEPs in three groups of coaches and players partaking in a cluster randomised trial. Secondary aims were to describe perceptions of IPEPs, use of programme material, and overall preventive strategies. METHODS This is a sub-study analysing data from a three-armed randomised trial with teams randomised to use either a comprehensive IPEP (extended Knee Control) or an adductor strength programme, and non-randomised teams that already used a self-chosen IPEP regularly at study start (comparison group). Teams were instructed to use their respective intervention across the 2020 football season. Male and female, adolescent (≥ 14 years of age), and adult amateur players took part. Coaches and players responded to weekly and end-of-season questionnaires. Data were presented descriptively. RESULTS Weekly player data were reported by 502 players (weekly response rate 65%), 289 (58%) responded to end-of-season questionnaires. Teams in the extended Knee Control and comparison group used their respective IPEP in 483/529 (91%) and 585/641 (91%) of training sessions, and teams in the adductor group in in 199/315 (63%) sessions. Regarding utilisation fidelity, 42-52% of players in each group used 1-10 repetitions per exercise. Seven out of 17 teams in the adductor group had progressed as recommended in terms of number of repetitions. Two teams (10%) in the extended Knee Control group, and 7/24 of comparison teams used the same exercises across the season. Coaches accessed the IPEPs by different means (printed material, films, workshops, etc.), but half did not use the provided digital material. The players appreciated that the IPEPs could reduce injury risk and that they improved their exercise performance, but disliked that they had less time for football and that the exercises were boring. Forty-nine players had experienced pain during IPEP performance. CONCLUSIONS Adherence with the IPEPs was generally high. To meet different coach needs, programme material should be available via different digital and printed resources. The number of players reporting pain during IPEP performance is a noteworthy finding. TRIAL REGISTRATION Clinical Trials gov identifier: NCT04272047. Registered February 17, 2020. https://clinicaltrials.gov/ct2/show/NCT04272047 .
Collapse
Affiliation(s)
- Hanna Lindblom
- Unit of Physiotherapy, Division of Prevention, Rehabilitation and Community Medicine, Department of Health, Medicine and Caring Sciences, Linköping University, 581 83, Linköping, Sweden.
- Sport Without Injury ProgrammE (SWIPE), Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden.
| | - Markus Waldén
- Sport Without Injury ProgrammE (SWIPE), Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
- Capio Ortho Center Skåne, Malmö, Sweden
| | - Martin Hägglund
- Unit of Physiotherapy, Division of Prevention, Rehabilitation and Community Medicine, Department of Health, Medicine and Caring Sciences, Linköping University, 581 83, Linköping, Sweden
- Sport Without Injury ProgrammE (SWIPE), Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| |
Collapse
|
43
|
Rosa A, Coleman M, Haun C, Grgic J, Schoenfeld BJ. Repetition Performance, Rating of Perceived Discomfort, and Blood Lactate Responses to Different Rest Interval Lengths in Single-Joint and Multijoint Lower-Body Exercise. J Strength Cond Res 2023; 37:1350-1357. [PMID: 37347940 DOI: 10.1519/jsc.0000000000004508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/24/2023]
Abstract
ABSTRACT Rosa, A, Coleman, M, Haun, C, Grgic, J, and Schoenfeld, BJ. Repetition performance, rating of perceived discomfort, and blood lactate responses to different rest interval lengths in single-joint and multijoint lower-body exercise. J Strength Cond Res 37(7): 1350-1357, 2023-The purpose of this study was to examine the effects of different rest interval lengths (RILs) on repetition performance, rating of discomfort, and blood lactate responses during lower-body single-joint and multijoint exercises. This study used a counterbalanced design where each subject performed the Smith machine back squat (BS) and leg extension (LE) using 3 different RIL configurations (1, 2, and 3 minutes) in a randomized fashion. Data collection occurred over the span of 3 separate days. Volunteers were randomly allocated to perform the independent variables (RILs and exercises) in 1 of 12 potential configurations. The initial session was allotted for familiarization with the rating of discomfort scale and 10 repetition maximum testing. The other 2 sessions involved training with the different configurations of RIL length using both the BS and LE. Randomization ensured that the BS was performed first in one of the training sessions and the LE was performed first in the other session. Results indicated that longer RILs had a small positive effect on repetition performance, with longer rest durations allowing for more repetitions compared with shorter durations. The largest difference in repetition performance between RILs was observed between 1 minute and 2-3 minutes rest; there were trivial differences in repetition performance between 2 and 3 minutes rest for both the BS and LE. Blood lactate levels were slightly higher with longer RILs. Overall, BS showed greater increases in blood lactate compared with LE, and these differences were magnified over time. Exercise selection and RIL both influenced rating of discomfort, with LE producing less discomfort than BS and longer RILs reducing perceived discomfort. Our findings suggest that RIL influences the repetition performance, blood lactate, and rating of discomfort responses between single-joint and multijoint exercises.
Collapse
Affiliation(s)
- Avery Rosa
- Department of Exercise Science and Recreation, CUNY Lehman College, Bronx, New York
| | - Max Coleman
- Department of Exercise Science and Recreation, CUNY Lehman College, Bronx, New York
| | - Cody Haun
- Fitomics LLC, Alabaster, Alabama; and
| | - Jozo Grgic
- Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia
| | - Brad J Schoenfeld
- Department of Exercise Science and Recreation, CUNY Lehman College, Bronx, New York
| |
Collapse
|
44
|
Akalu Y, Frazer AK, Howatson G, Pearce AJ, Siddique U, Rostami M, Tallent J, Kidgell DJ. Identifying the role of the reticulospinal tract for strength and motor recovery: A scoping review of nonhuman and human studies. Physiol Rep 2023; 11:e15765. [PMID: 37474275 PMCID: PMC10359156 DOI: 10.14814/phy2.15765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 06/26/2023] [Indexed: 07/22/2023] Open
Abstract
In addition to the established postural control role of the reticulospinal tract (RST), there has been an increasing interest on its involvement in strength, motor recovery, and other gross motor functions. However, there are no reviews that have systematically assessed the overall motor function of the RST. Therefore, we aimed to determine the role of the RST underpinning motor function and recovery. We performed a literature search using Ovid Medline, Embase, CINAHL Plus, and Scopus to retrieve papers using key words for RST, strength, and motor recovery. Human and animal studies which assessed the role of RST were included. Studies were screened and 32 eligible studies were included for the final analysis. Of these, 21 of them were human studies while the remaining were on monkeys and rats. Seven experimental animal studies and four human studies provided evidence for the involvement of the RST in motor recovery, while two experimental animal studies and eight human studies provided evidence for strength gain. The RST influenced gross motor function in two experimental animal studies and five human studies. Overall, the RST has an important role for motor recovery, gross motor function and at least in part, underpins strength gain. The role of RST for strength gain in healthy people and its involvement in spasticity in a clinical population has been limitedly described. Further studies are required to ascertain the role of the RST's role in enhancing strength and its contribution to the development of spasticity.
Collapse
Affiliation(s)
- Yonas Akalu
- Monash Exercise Neuroplasticity Research UnitDepartment of PhysiotherapySchool of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health ScienceMonash UniversityMelbourneVictoriaAustralia
- Department of Human PhysiologySchool of MedicineUniversity of GondarGondarEthiopia
| | - Ashlyn K. Frazer
- Monash Exercise Neuroplasticity Research UnitDepartment of PhysiotherapySchool of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health ScienceMonash UniversityMelbourneVictoriaAustralia
| | - Glyn Howatson
- Department of Sport, Exercise and RehabilitationNorthumbria UniversityNewcastleUK
- Water Research GroupNorth West UniversityPotchefstroomSouth Africa
| | - Alan J. Pearce
- College of Science, Health and EngineeringLa Trobe UniversityMelbourneVictoriaAustralia
| | - Ummatul Siddique
- Monash Exercise Neuroplasticity Research UnitDepartment of PhysiotherapySchool of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health ScienceMonash UniversityMelbourneVictoriaAustralia
| | - Mohamad Rostami
- Monash Exercise Neuroplasticity Research UnitDepartment of PhysiotherapySchool of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health ScienceMonash UniversityMelbourneVictoriaAustralia
| | - Jamie Tallent
- Monash Exercise Neuroplasticity Research UnitDepartment of PhysiotherapySchool of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health ScienceMonash UniversityMelbourneVictoriaAustralia
- School of Sport, Rehabilitation and Exercise SciencesUniversity of EssexColchesterUK
| | - Dawson J. Kidgell
- Monash Exercise Neuroplasticity Research UnitDepartment of PhysiotherapySchool of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health ScienceMonash UniversityMelbourneVictoriaAustralia
| |
Collapse
|
45
|
Mohamady HM, Taha MM, Aneis YM, Aldhahi MI, Attalla AF. Effect of Combined Electromagnetic Field and Plantar Flexion Resistance Exercise on Wound Healing in Patients with Venous Leg Ulcers: A Randomized Controlled Trial. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1157. [PMID: 37374361 DOI: 10.3390/medicina59061157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 05/16/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023]
Abstract
Background and Objectives: Venous ulcers are recognized to be more painful and resistant to therapy than ulcers of other etiologies. Various methods have been used for the conservative treatment of venous ulcers, such as pulsed electromagnetic field (PEMF) and plantar exercise, which promote wound healing due to a range of physiological effects. The study aimed to examine the effect of combined pulsed electromagnetic field therapy and plantar flexion resistance exercise (PRE) on patients with venous leg ulcers (VLUs). Materials and Methods: The study was a prospective, randomized controlled trial. A total of 60 patients between the ages of 40 and 55 with venous ulcers were randomly assigned to 1 of 3 groups. For up to 12 weeks, the first group received PEMF therapy and plantar flexion resistance exercise (PRE) therapy in addition to conservative ulcer treatment for up to 12 weeks. The second group received only PEMF therapy in addition to conservative ulcer treatment, while the third group served as the control and received only conservative ulcer treatment. Results: At the four-week follow-up, the two experimental groups revealed a considerable variation in ulcer surface area (USA) and ulcer volume (UV), with no significant change in the control group. At the 12-week follow-up, there were significant differences between the three groups, while group A underwent the most significant changes, with mean differences at [95% confidence interval] of (-4.75, -3.82, -0.98) for USA and (-12.63, -9.55, -2.45) for UV, respectively. Conclusions: On a short-term basis, adding a plantar resistance exercise to the PEMF had no appreciable short-term effects on ulcer healing; however, their combination had more pronounced medium-term effects.
Collapse
Affiliation(s)
- Heba Mohamed Mohamady
- Department of Physical Therapy for Surgery, Faculty of Physical Therapy, Cairo University, Giza 11432, Egypt
| | - Mona Mohamed Taha
- Department of Rehabilitation Sciences, College of Health and Rehabilitation Sciences, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Yasser M Aneis
- Department of Basic Sciences, Faculty of Physical Therapy, Cairo University, Giza 11432, Egypt
- Department of Basic Sciences, Faculty of Physical Therapy, Delta University for Science and Technology, Gamasa City 11152, Egypt
| | - Monira I Aldhahi
- Department of Rehabilitation Sciences, College of Health and Rehabilitation Sciences, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Asmaa Fawzy Attalla
- Department of Physical Therapy for Surgery, Faculty of Physical Therapy, Cairo University, Giza 11432, Egypt
| |
Collapse
|
46
|
Bersiner K, Park SY, Schaaf K, Yang WH, Theis C, Jacko D, Gehlert S. Resistance exercise: a mighty tool that adapts, destroys, rebuilds and modulates the molecular and structural environment of skeletal muscle. Phys Act Nutr 2023; 27:78-95. [PMID: 37583075 PMCID: PMC10440184 DOI: 10.20463/pan.2023.0021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/29/2023] [Accepted: 06/30/2023] [Indexed: 08/17/2023] Open
Abstract
PURPOSE Skeletal muscle regulates health and performance by maintaining or increasing strength and muscle mass. Although the molecular mechanisms in response to resistance exercise (RE) significantly target the activation of protein synthesis, a plethora of other mechanisms and structures must be involved in orchestrating the communication, repair, and restoration of homeostasis after RE stimulation. In practice, RE can be modulated by variations in intensity, continuity and volume, which affect molecular responses and skeletal muscle adaptation. Knowledge of these aspects is important with respect to planning of training programs and assessing the impact of RE training on skeletal muscle. METHODS In this narrative review, we introduce general aspects of skeletal muscle substructures that adapt in response to RE. We further highlighted the molecular mechanisms that control human skeletal muscle anabolism, degradation, repair and memory in response to acute and repeated RE and linked these aspects to major training variables. RESULTS Although RE is a key stimulus for the activation of skeletal muscle anabolism, it also induces myofibrillar damage. Nevertheless, to increase muscle mass accompanied by a corresponding adaptation of the essential substructures of the sarcomeric environment, RE must be continuously repeated. This requires the permanent engagement of molecular mechanisms that re-establish skeletal muscle integrity after each RE-induced muscle damage. CONCLUSION Various molecular regulators coordinately control the adaptation of skeletal muscle after acute and repeated RE and expand their actions far beyond muscle growth. Variations of key resistance training variables likely affect these mechanisms without affecting muscle growth.
Collapse
Affiliation(s)
- Käthe Bersiner
- Department for Biosciences of Sports, Institute of Sports Science, University of Hildesheim, Hildesheim, Germany
| | - So-Young Park
- Graduate School of Sports Medicine, CHA University, Pocheon, Republic of Korea
| | - Kirill Schaaf
- Department of Molecular and Cellular Sports Medicine, Institute of Cardiovascular Research and Sports Medicine, German Sport University Cologne, Cologne, Germany
| | - Woo-Hwi Yang
- Graduate School of Sports Medicine, CHA University, Pocheon, Republic of Korea
- Department of Medicine, General Graduate School, CHA University, Pocheon, Republic of Korea
| | - Christian Theis
- Center for Anaesthesiology, Helios University Hospital Wuppertal, Wuppertal, Germany
| | - Daniel Jacko
- Department of Molecular and Cellular Sports Medicine, Institute of Cardiovascular Research and Sports Medicine, German Sport University Cologne, Cologne, Germany
| | - Sebastian Gehlert
- Department for Biosciences of Sports, Institute of Sports Science, University of Hildesheim, Hildesheim, Germany
| |
Collapse
|
47
|
Weakley J, Schoenfeld BJ, Ljungberg J, Halson SL, Phillips SM. Physiological Responses and Adaptations to Lower Load Resistance Training: Implications for Health and Performance. SPORTS MEDICINE - OPEN 2023; 9:28. [PMID: 37171517 PMCID: PMC10182225 DOI: 10.1186/s40798-023-00578-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 05/02/2023] [Indexed: 05/13/2023]
Abstract
Resistance training is a method of enhancing strength, gait speed, mobility, and health. However, the external load required to induce these benefits is a contentious issue. A growing body of evidence suggests that when lower load resistance training [i.e., loads < 50% of one-repetition maximum (1RM)] is completed within close proximity to concentric failure, it can serve as an effective alternative to traditional higher load (i.e., loads > 70% of 1RM) training and in many cases can promote similar or even superior physiological adaptations. Such findings are important given that confidence with external loads and access to training facilities and equipment are commonly cited barriers to regular resistance training. Here, we review some of the mechanisms and physiological changes in response to lower load resistance training. We also consider the evidence for applying lower loads for those at risk of cardiovascular and metabolic diseases and those with reduced mobility. Finally, we provide practical recommendations, specifically that to maximize the benefits of lower load resistance training, high levels of effort and training in close proximity to concentric failure are required. Additionally, using lower loads 2-3 times per week with 3-4 sets per exercise, and loads no lower than 30% of 1RM can enhance muscle hypertrophy and strength adaptations. Consequently, implementing lower load resistance training can be a beneficial and viable resistance training method for a wide range of fitness- and health-related goals.
Collapse
Affiliation(s)
- Jonathon Weakley
- School of Behavioural and Health Sciences, Australian Catholic University, 211.1.26, Brisbane, QLD, Australia.
- Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre, Australian Catholic University, Brisbane, QLD, Australia.
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK.
| | | | - Johanna Ljungberg
- The University of Queensland Diamantina Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Shona L Halson
- School of Behavioural and Health Sciences, Australian Catholic University, 211.1.26, Brisbane, QLD, Australia
- Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre, Australian Catholic University, Brisbane, QLD, Australia
| | - Stuart M Phillips
- Department of Kinesiology, McMaster University, Hamilton, ON, L8S 4K1, Canada
| |
Collapse
|
48
|
Spiering BA, Clark BC, Schoenfeld BJ, Foulis SA, Pasiakos SM. Maximizing Strength: The Stimuli and Mediators of Strength Gains and Their Application to Training and Rehabilitation. J Strength Cond Res 2023; 37:919-929. [PMID: 36580280 DOI: 10.1519/jsc.0000000000004390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
ABSTRACT Spiering, BA, Clark, BC, Schoenfeld, BJ, Foulis, SA, and Pasiakos, SM. Maximizing strength: the stimuli and mediators of strength gains and their application to training and rehabilitation. J Strength Cond Res 37(4): 919-929, 2023-Traditional heavy resistance exercise (RE) training increases maximal strength, a valuable adaptation in many situations. That stated, some populations seek new opportunities for pushing the upper limits of strength gains (e.g., athletes and military personnel). Alternatively, other populations strive to increase or maintain strength but cannot perform heavy RE (e.g., during at-home exercise, during deployment, or after injury or illness). Therefore, the purpose of this narrative review is to (a) identify the known stimuli that trigger gains in strength; (b) identify the known factors that mediate the long-term effectiveness of these stimuli; (c) discuss (and in some cases, speculate on) potential opportunities for maximizing strength gains beyond current limits; and (d) discuss practical applications for increasing or maintaining strength when traditional heavy RE cannot be performed. First, by conceptually deconstructing traditional heavy RE, we identify that strength gains are stimulated through a sequence of events, namely: giving maximal mental effort, leading to maximal neural activation of muscle to produce forceful contractions, involving lifting and lowering movements, training through a full range of motion, and (potentially) inducing muscular metabolic stress. Second, we identify factors that mediate the long-term effectiveness of these RE stimuli, namely: optimizing the dose of RE within a session, beginning each set of RE in a minimally fatigued state, optimizing recovery between training sessions, and (potentially) periodizing the training stimulus over time. Equipped with these insights, we identify potential opportunities for further maximizing strength gains. Finally, we identify opportunities for increasing or maintaining strength when traditional heavy RE cannot be performed.
Collapse
Affiliation(s)
- Barry A Spiering
- Military Performance Division, U.S. Army Research Institute of Environmental Medicine, Natick, Massachusetts
| | - Brian C Clark
- Ohio Musculoskeletal and Neurological Institute, Ohio University, Athens, Ohio
- Department of Biomedical Sciences, Ohio University, Athens, Ohio; and
| | | | - Stephen A Foulis
- Military Performance Division, U.S. Army Research Institute of Environmental Medicine, Natick, Massachusetts
| | - Stefan M Pasiakos
- Military Performance Division, U.S. Army Research Institute of Environmental Medicine, Natick, Massachusetts
| |
Collapse
|
49
|
Comfort P, Haff GG, Suchomel TJ, Soriano MA, Pierce KC, Hornsby WG, Haff EE, Sommerfield LM, Chavda S, Morris SJ, Fry AC, Stone MH. National Strength and Conditioning Association Position Statement on Weightlifting for Sports Performance. J Strength Cond Res 2023; 37:1163-1190. [PMID: 36952649 DOI: 10.1519/jsc.0000000000004476] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
ABSTRACT Comfort, P, Haff, GG, Suchomel, TJ, Soriano, MA, Pierce, KC, Hornsby, WG, Haff, EE, Sommerfield, LM, Chavda, S, Morris, SJ, Fry, AC, and Stone, MH. National Strength and Conditioning Association position statement on weightlifting for sports performance. J Strength Cond Res XX(X): 000-000, 2022-The origins of weightlifting and feats of strength span back to ancient Egypt, China, and Greece, with the introduction of weightlifting into the Olympic Games in 1896. However, it was not until the 1950s that training based on weightlifting was adopted by strength coaches working with team sports and athletics, with weightlifting research in peer-reviewed journals becoming prominent since the 1970s. Over the past few decades, researchers have focused on the use of weightlifting-based training to enhance performance in nonweightlifters because of the biomechanical similarities (e.g., rapid forceful extension of the hips, knees, and ankles) associated with the second pull phase of the clean and snatch, the drive/thrust phase of the jerk and athletic tasks such as jumping and sprinting. The highest force, rate of force development, and power outputs have been reported during such movements, highlighting the potential for such tasks to enhance these key physical qualities in athletes. In addition, the ability to manipulate barbell load across the extensive range of weightlifting exercises and their derivatives permits the strength and conditioning coach the opportunity to emphasize the development of strength-speed and speed-strength, as required for the individual athlete. As such, the results of numerous longitudinal studies and subsequent meta-analyses demonstrate the inclusion of weightlifting exercises into strength and conditioning programs results in greater improvements in force-production characteristics and performance in athletic tasks than general resistance training or plyometric training alone. However, it is essential that such exercises are appropriately programmed adopting a sequential approach across training blocks (including exercise variation, loads, and volumes) to ensure the desired adaptations, whereas strength and conditioning coaches emphasize appropriate technique and skill development of athletes performing such exercises.
Collapse
Affiliation(s)
- Paul Comfort
- University of Salford, Greater Manchester, United Kingdom
- Edith Cowan University, Perth, Australia
| | - G Gregory Haff
- University of Salford, Greater Manchester, United Kingdom
- Edith Cowan University, Perth, Australia
| | - Timothy J Suchomel
- University of Salford, Greater Manchester, United Kingdom
- Carroll University, Waukesha, Wisconsin
| | | | | | | | - Erin E Haff
- University of Salford, Greater Manchester, United Kingdom
- Australian Weightlifting Federation, Chandler, Australia
| | | | - Shyam Chavda
- London Sports Institute, Middlesex University, London, United Kingdom
- British Weightlifting, Leeds, United Kingdom
| | | | | | | |
Collapse
|
50
|
Langer K, Simon C, Wiemeyer J. Strength Training in Climbing: A Systematic Review. J Strength Cond Res 2023; 37:751-767. [PMID: 36820707 DOI: 10.1519/jsc.0000000000004286] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
ABSTRACT Langer, K, Simon, C, and Wiemeyer, J. Strength training in climbing: A systematic review. J Strength Cond Res 37(3): 751-767, 2023-The aim of this review was to provide an overview of the state of research on strength training in climbing and to answer the question how climbing performance, maximum grip strength, upper-limb strength endurance, maximum upper-limb strength, and upper-limb power as dependent variables are affected by different types of training. Moreover, we addressed the question which training methods and training parameters are most effective in increasing climbing and bouldering performance. Searches of MEDLINE (PubMed), SPORTDiscus, ProQuest, and Google Scholar were conducted for studies that met the following criteria: (a) examining effects of training on at least one of the dependent variables, (b) controlled longitudinal design with pretest and posttest, and (c) detailed information on training parameters and subjects. Twelve studies were included into the review. The quality of the studies was rated according to the PEDro scale, and the training interventions were classified according to training method (maximum strength [MS], hypertrophy [HYP], and endurance [END]), specificity (specific, semispecific, and unspecific), and static or dynamic exercises. For 9 of the 12 studies, effect sizes were calculated and the treatments compared. The results showed (a) positive effects of strength training on all variables, (b) a trend toward a mixture of MS and HYP or END training, (c) a trend toward semispecific exercise, and (d) similar effects for dynamic and static exercise with a trend toward a mixture of both. Coaches and athletes are recommended to combine static and dynamic semispecific exercises in a HYP and MS or END training.
Collapse
Affiliation(s)
- Kaja Langer
- Department of Human Sciences, Institute of Sports Science, Technical University Darmstadt, Darmstadt, Germany
| | | | | |
Collapse
|