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Perret C, Käch M, Hertig-Godeschalk A, Ammann F. Strength and power adaptations of the upper body following 20 training sessions on an eccentric arm-crank ergometer. Eur J Appl Physiol 2024:10.1007/s00421-024-05486-3. [PMID: 38656379 DOI: 10.1007/s00421-024-05486-3] [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: 01/12/2024] [Accepted: 04/04/2024] [Indexed: 04/26/2024]
Abstract
PURPOSE Eccentric strength training is an innovative and promising approach to improve exercise performance. However, most eccentric training studies in the past were performed with a focus on the lower extremities. The present study aimed to test the feasibility and effects on strength and power adaptations of a structured upper-body eccentric training program. METHODS Fourteen (median age (Q1-Q3) 29 years (27-32); 9 females, 5 males) healthy, regularly exercising individuals performed 20 progressive training sessions (2-3 sessions/week at 20-50% peak power for 8-14 min) on a symmetric eccentric arm-crank ergometer. Before and after the intervention, anaerobic peak power (PP) and maximal concentric aerobic power output (POmax) on an arm-crank ergometer as well as the one repetition maximum (1RM) for bench press were determined as main outcome parameters. A p-value ≤ 0.05 was considered statistically significant. RESULTS Significant improvements in PP (+ 4% (1-8), p = 0.007), POmax (+ 6% (0-8); p = 0.01), and 1RM (+ 12% (10-17); p < 0.001) were found. Exercise intensity was relatively low at 64% (55-70) of maximum heart rate. CONCLUSIONS Twenty progressive training sessions on a symmetric arm-crank ergometer are effective in inducing significant aerobic and anaerobic performance and strength improvements in the upper body. This intervention is safe and feasible, and can be performed at relatively low cardiovascular intensities. Therefore, this training method offers an interesting approach from elite sports to rehabilitation.
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Affiliation(s)
- Claudio Perret
- Swiss Paraplegic Research, Guido A. Zaech-Strasse 4, 6207, Nottwil, Switzerland
- Faculty of Health Sciences and Medicine, University of Lucerne, Lucerne, Switzerland
| | - Matheo Käch
- Institute of Human Movement Sciences and Sports, ETH Zurich, Zurich, Switzerland
- Institute of Sports Medicine, Swiss Paraplegic Centre, Nottwil, Switzerland
| | | | - Fabian Ammann
- Institute of Sports Medicine, Swiss Paraplegic Centre, Nottwil, Switzerland
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Yang TJ, Shiu YJ, Chen CH, Yu SY, Hsu YY, Chiu CH. Carbohydrate Mouth Rinses before Exercise Improve Performance of Romanian Deadlift Exercise: A Randomized Crossover Study. Nutrients 2024; 16:1248. [PMID: 38674938 PMCID: PMC11053948 DOI: 10.3390/nu16081248] [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: 03/26/2024] [Revised: 04/19/2024] [Accepted: 04/19/2024] [Indexed: 04/28/2024] Open
Abstract
(1) Background: This study compared the effects of mouth rinsing with a carbohydrate trial (CMR) and a placebo trial (PL) on concentric and eccentric contraction strength in multi-joint resistance exercise performance. (2) Methods: Twenty healthy adult men (age: 22.4 ± 3.7 years, body mass index: 26 ± 3.8, peak power: 378.3 ± 138.7 W) were recruited in this study. Participants were employed in a double-blind, randomized crossover design to divide participants into carbohydrate mouth rinsing trial (CMR) and placebo trial (PL). After warming up, participants used 6.6% maltodextrin (CMR) or mineral water (PL) to rinse their mouth for 20 s. Next, the participants underwent tests of maximum inertial Romanian deadlift resistance exercise comprising five sets of six reps, with 3 min rests between sets. After deducting the first repetition of each set, the mean values from the five sets were analyzed. (3) Results: The concentric peak power of the CMR trial was significantly higher than that of the PL trial (p = 0.001, Cohen's d = 0.46), the eccentric peak power of the CMR trial was significantly higher than that of the PL trial (p = 0.008, Cohen's d = 0.56), and the total work of the CMR trial was significantly higher than that of PL trial (p = 0.002, Cohen's d = 0.51). (4) Conclusions: These findings demonstrate that mouth rinsing with carbohydrates before exercise can improve concentric and eccentric contraction strength in multi-joint resistance exercise performance.
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Affiliation(s)
- Tsung-Jen Yang
- Physical Education Center, Feng Chia University, Taichung City 407, Taiwan;
| | - Yi-Jie Shiu
- Department of Physical Education and Sport Sciences, National Taiwan Normal University, Taipei 106, Taiwan;
| | - Che-Hsiu Chen
- Department of Sport Performance, National Taiwan University of Sport, Taichung 404, Taiwan;
| | - Sheng-Yan Yu
- Graduate Program in Department of Exercise Health Science, National Taiwan University of Sport, Taichung 404, Taiwan;
| | - Ya-Ying Hsu
- Jaunan Elementary School, Miaoli 350, Taiwan;
| | - Chih-Hui Chiu
- Graduate Program in Department of Exercise Health Science, National Taiwan University of Sport, Taichung 404, Taiwan;
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Maroto-Izquierdo S, García-López D, Beato M, Bautista IJ, Hernández-Davó JL, Raya-González J, Martín-Rivera F. Force Production and Electromyographic Activity during Different Flywheel Deadlift Exercises. Sports (Basel) 2024; 12:95. [PMID: 38668563 PMCID: PMC11054580 DOI: 10.3390/sports12040095] [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: 02/03/2024] [Revised: 03/17/2024] [Accepted: 03/28/2024] [Indexed: 04/29/2024] Open
Abstract
This study aimed to characterize and compare force production and muscle activity during four flywheel deadlift exercises (bilateral [Bi] vs. unilateral [Uni]) with different loading conditions (vertical [Ver] vs. horizontal [Hor]). Twenty-three team-sport athletes underwent assessments for exercise kinetics (hand-grip force), along with surface electromyography (sEMG) of the proximal (BFProx) and medial biceps femoris (BFMed), semitendinosus (ST), and gluteus medius (GM). Mean and peak force were highest (p < 0.001) in Bi + Ver compared with Bi + Hor, Uni + Ver, and Uni + Hor. Although no significant differences were observed between Bi + Hor and Uni + Ver, both variants showed higher (p < 0.001) average force and peak eccentric force when compared with Uni + Hor. The presence of eccentric overload was only observed in the vertically loaded variants. Bi + Ver and Uni + Ver showed higher (p < 0.05) sEMG levels in BFProx and BFMed compared with the Uni + Hor variant. In addition, Uni + Ver registered the largest GM and ST sEMG values. In conclusion, the vertical variants of the flywheel deadlift exercise led to higher muscle force production and sEMG compared with their horizontal counterparts. Both Bi + Ver and Uni + Ver may be effective in promoting an increase in hamstring muscles activity and muscle force at long muscle length, while the Uni + Ver variant may be more effective in promoting GM and ST involvement.
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Affiliation(s)
- Sergio Maroto-Izquierdo
- i+HeALTH Strategic Research Group, Department of Health Sciences, European University Miguel de Cervantes, 47012 Valladolid, Spain
- Proporción A, Applied Sports Science Centre, 47015 Valladolid, Spain
| | - David García-López
- Department of Health Sciences, European University Miguel de Cervantes, 47012 Valladolid, Spain
| | - Marco Beato
- School of Health and Sports Sciences, University of Suffolk, Ipswich IP4 1QJ, UK
- Institute of Health and Wellbeing, University of Suffolk, Ipswich IP4 1QJ, UK
| | - Iker J. Bautista
- Institute of Sport and Allied Health, University of Chichester, Chichester PO19 6PE, UK
| | | | | | - Fernando Martín-Rivera
- Prevention and Health in Exercise and Sport, University of Valencia, 46010 Valencia, Spain
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Wang J, Zhang Q, Chen W, Fu H, Zhang M, Fan Y. The effect of flywheel complex training with eccentric-overload on muscular adaptation in elite female volleyball players. PeerJ 2024; 12:e17079. [PMID: 38525282 PMCID: PMC10961060 DOI: 10.7717/peerj.17079] [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: 08/07/2023] [Accepted: 02/19/2024] [Indexed: 03/26/2024] Open
Abstract
This study aimed to compare the effects of 8 weeks (24 sessions) between flywheel complex training with eccentric overload and traditional complex training of well-trained volleyball players on muscle adaptation, including hypertrophy, strength, and power variables. Fourteen athletes were recruited and randomly divided into the flywheel complex training with an eccentric-overload group (FCTEO, n = 7) and the control group (the traditional complex training group, TCT, n = 7). Participants performed half-squats using a flywheel device or Smith machine and drop jumps, with three sets of eight repetitions and three sets of 12 repetitions, respectively. The variables assessed included the muscle thickness at the proximal, mid, and distal sections of the quadriceps femoris, maximal half-squats strength (1RM-SS), squat jump (SJ), countermovement jump (CMJ), and three-step approach jump (AJ). In addition, a two-way repeated ANOVA analysis was used to find differences between the two groups and between the two testing times (pre-test vs. post-test). The indicators of the FCTEO group showed a significantly better improvement (p < 0.05) in CMJ (height: ES = 0.648, peak power: ES = 0.750), AJ (height: ES = 0.537, peak power: ES = 0.441), 1RM-SS (ES = 0.671) compared to the TCT group and the muscle thicknes at the mid of the quadriceps femoris (ES = 0.504) after FCTEO training. Since volleyball requires lower limb strength and explosive effort during repeated jumps and spiking, these results suggest that FCTEO affects muscular adaptation in a way that improves performance in well-trained female volleyball players.
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Affiliation(s)
- Jiaoqin Wang
- Capital University of Physical Education and Sports, Beijing, China
- Beijing Sport University, Beijing, China
| | - Qiang Zhang
- Capital University of Physical Education and Sports, Beijing, China
| | | | - Honghao Fu
- Huazhong University of Science and Technology, Wuhan, China
| | - Ming Zhang
- Beijing Sport University, Beijing, China
| | - Yongzhao Fan
- Department of Physical Education, Henan Normal University, Xinxiang, China
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Beato M, de Keijzer KL, Muñoz-Lopez A, Raya-González J, Pozzo M, Alkner BA, Dello Iacono A, Vicens-Bordas J, Coratella G, Maroto-Izquierdo S, Gonzalo-Skok O, McErlain-Naylor SA, Martin-Rivera F, Hernandez-Davo JL, Arrones LS, Sabido R, de Hoyo M, Fernandez-Gonzalo R, Norrbrand L. Current Guidelines for the Implementation of Flywheel Resistance Training Technology in Sports: A Consensus Statement. Sports Med 2024; 54:541-556. [PMID: 38175461 PMCID: PMC10978721 DOI: 10.1007/s40279-023-01979-x] [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: 12/05/2023] [Indexed: 01/05/2024]
Abstract
BACKGROUND Flywheel resistance training has become more integrated within resistance training programs in a variety of sports due to the neuromuscular, strength, and task-specific enhancements reported with this training. OBJECTIVE This paper aimed to present the consensus reached by internationally recognized experts during a meeting on current definitions and guidelines for the implementation of flywheel resistance training technology in sports. METHODS Nineteen experts from different countries took part in the consensus process; 16 of them were present at the consensus meeting (18 May 2023) while three submitted their recommendations by e-mail. Prior to the meeting, evidence summaries were developed relating to areas of priority. This paper discusses the available evidence and consensus process from which recommendations were made regarding the appropriate use of flywheel resistance training technology in sports. The process to gain consensus had five steps: (1) performing a systematic review of systematic reviews, (2) updating the most recent umbrella review published on this topic, (3) first round discussion among a sample of the research group included in this consensus statement, (4) selection of research group members-process of the consensus meeting and formulation of the recommendations, and (5) the consensus process. The systematic analysis of the literature was performed to select the most up-to-date review papers available on the topic, which resulted in nine articles; their methodological quality was assessed according to AMSTAR 2 (Assessing the Methodological Quality of Systematic Review 2) and GRADE (Grading Recommendations Assessment Development and Evaluation). Statements and recommendations scoring 7-9 were considered appropriate. RESULTS The recommendations were based on the evidence summary and researchers' expertise; the consensus statement included three statements and seven recommendations for the use of flywheel resistance training technology. These statements and recommendations were anonymously voted on and qualitatively analyzed. The three statements reported a score ranging from 8.1 to 8.8, and therefore, all statements included in this consensus were considered appropriate. The recommendations (1-7) had a score ranging from 7.7 to 8.6, and therefore, all recommendations were considered appropriate. CONCLUSIONS Because of the consensus achieved among the experts in this project, it is suggested that practitioners and researchers should adopt the guidelines reported in this consensus statement regarding the use of flywheel resistance technology in sports.
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Affiliation(s)
- Marco Beato
- School of Allied Health Sciences, University of Suffolk, Ipswich, UK.
| | | | - Alejandro Muñoz-Lopez
- Departamento de Motricidad Humana y Rendimiento Deportivo, University of Seville, Seville, Spain
| | | | - Marco Pozzo
- Master de Fútbol, Universidad Pablo de Olavide, Seville, Spain
- SmartCoach Technologies, Inc., Seville, Spain
| | - Björn A Alkner
- Department of Orthopaedic Surgery, Eksjö, Region Jönköping County, Sweden
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Antonio Dello Iacono
- School of Health and Life Sciences, University of the West of Scotland, Paisley, Scotland
| | - Jordi Vicens-Bordas
- Sport, Exercise, and Human Movement (SEaHM), University of Vic-Central University of Catalonia, Barcelona, Spain
- Sport and Physical Activity Studies Centre (CEEAF), University of Vic-Central University of Catalonia, Barcelona, Spain
| | - Giuseppe Coratella
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy
| | | | - Oliver Gonzalo-Skok
- Department of Communication and Education, Universidad Loyola Andalucía, Seville, Spain
| | | | - Fernando Martin-Rivera
- Research Group in Prevention and Health in Exercise and Sport, University of Valencia, Valencia, Spain
| | | | | | - Rafael Sabido
- Sport Research Centre, Department of Sport Sciences, Miguel Hernández University, Elche, Spain
| | - Moises de Hoyo
- Department of Physical Education and Sport, University of Seville, Seville, Spain
- Performance Department, Aston Villa Football Club, Birmingham, UK
| | - Rodrigo Fernandez-Gonzalo
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, Stockholm, Sweden
- Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden
| | - Lena Norrbrand
- Division of Environmental Physiology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Solna, Sweden
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McNeill C, Beaven CM, McMaster DT, Ward P, Gill N. Eccentric Force-Velocity-Load Relationship in Trained Rugby Union Athletes. J Strength Cond Res 2024; 38:549-555. [PMID: 38088926 DOI: 10.1519/jsc.0000000000004648] [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: 02/29/2024]
Abstract
ABSTRACT McNeill, C, Beaven, CM, McMaster, DT, Ward, P, and Gill, N. Eccentric force-velocity-load relationship in trained rugby union athletes. J Strength Cond Res 38(3): 549-555, 2024-The force-velocity relationship is traditionally believed to resemble a hyperbolic shape, known as the "force-velocity curve." However, there is less evidence regarding this relationship during eccentric muscle action in multijoint isotonic exercise, especially in applied settings. The purpose of this study was to investigate the force-velocity-load relationship in an incremental eccentric back squat test. In addition, 37 professional male rugby union athletes were recruited to participate. Separate generalized linear mixed models were used to analyze the effect of barbell load on relative eccentric peak force (REPF), relative eccentric mean force (REMF), eccentric peak velocity (EPV), and eccentric mean velocity (EMV). A significant effect of load ( p < 0.05) was observed for each of the eccentric variables tested. Each increase in barbell load tended to result in a linear increase in REMF and a decrease in EMV and EPV; however, we observed a plateauing effect for REPF as load increased. These results show that for "peak" variables lighter loads produced similar magnitudes of force, but generally moved at higher velocities than heavier loads. These observations suggest that the eccentric force-velocity-load relationship may vary depending on the parameters used. Quantifying rapid, multijoint eccentric performance is justified as it seems to provide valuable insight into individual athletic capability and training program design. Further research may investigate the responsiveness of the qualities to training and the causal nature of eccentric characteristics and athletic performance.
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Affiliation(s)
- Conor McNeill
- Te Huataki Waiora School of Health, Adams Centre for High Performance, The University of Waikato, Tauranga, New Zealand
- New Zealand Rugby Union, Wellington, New Zealand; and
| | - C Martyn Beaven
- Te Huataki Waiora School of Health, Adams Centre for High Performance, The University of Waikato, Tauranga, New Zealand
| | - Daniel T McMaster
- Te Huataki Waiora School of Health, Adams Centre for High Performance, The University of Waikato, Tauranga, New Zealand
- New Zealand Rugby Union, Wellington, New Zealand; and
| | | | - Nicholas Gill
- Te Huataki Waiora School of Health, Adams Centre for High Performance, The University of Waikato, Tauranga, New Zealand
- New Zealand Rugby Union, Wellington, New Zealand; and
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Li DCW, Rudloff S, Langer HT, Norman K, Herpich C. Age-Associated Differences in Recovery from Exercise-Induced Muscle Damage. Cells 2024; 13:255. [PMID: 38334647 PMCID: PMC10854791 DOI: 10.3390/cells13030255] [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: 12/31/2023] [Revised: 01/23/2024] [Accepted: 01/24/2024] [Indexed: 02/10/2024] Open
Abstract
Understanding the intricate mechanisms governing the cellular response to resistance exercise is paramount for promoting healthy aging. This narrative review explored the age-related alterations in recovery from resistance exercise, focusing on the nuanced aspects of exercise-induced muscle damage in older adults. Due to the limited number of studies in older adults that attempt to delineate age differences in muscle discovery, we delve into the multifaceted cellular influences of chronic low-grade inflammation, modifications in the extracellular matrix, and the role of lipid mediators in shaping the recovery landscape in aging skeletal muscle. From our literature search, it is evident that aged muscle displays delayed, prolonged, and inefficient recovery. These changes can be attributed to anabolic resistance, the stiffening of the extracellular matrix, mitochondrial dysfunction, and unresolved inflammation as well as alterations in satellite cell function. Collectively, these age-related impairments may impact subsequent adaptations to resistance exercise. Insights gleaned from this exploration may inform targeted interventions aimed at enhancing the efficacy of resistance training programs tailored to the specific needs of older adults, ultimately fostering healthy aging and preserving functional independence.
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Affiliation(s)
- Donna Ching Wah Li
- Department of Nutrition and Gerontology, German Institute of Human Nutrition Potsdam-Rehbrücke, 14558 Nuthetal, Germany
- Institute of Nutritional Science, University of Potsdam, 14558 Nuthetal, Germany
| | - Stefan Rudloff
- Department of Geriatrics and Medical Gerontology, Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 13347 Berlin, Germany
| | | | - Kristina Norman
- Department of Nutrition and Gerontology, German Institute of Human Nutrition Potsdam-Rehbrücke, 14558 Nuthetal, Germany
- Institute of Nutritional Science, University of Potsdam, 14558 Nuthetal, Germany
- Department of Geriatrics and Medical Gerontology, Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 13347 Berlin, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Berlin, 10785 Berlin, Germany
| | - Catrin Herpich
- Department of Nutrition and Gerontology, German Institute of Human Nutrition Potsdam-Rehbrücke, 14558 Nuthetal, Germany
- Institute of Nutritional Science, University of Potsdam, 14558 Nuthetal, Germany
- Department of Geriatrics and Medical Gerontology, Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 13347 Berlin, Germany
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Sautillet B, Bourdillon N, Millet GP, Lemaître F, Cozette M, Delanaud S, Ahmaïdi S, Costalat G. Hot water immersion: Maintaining core body temperature above 38.5°C mitigates muscle fatigue. Scand J Med Sci Sports 2024; 34:e14503. [PMID: 37747708 DOI: 10.1111/sms.14503] [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: 03/28/2023] [Revised: 09/06/2023] [Accepted: 09/15/2023] [Indexed: 09/26/2023]
Abstract
PURPOSE Hot water immersion (HWI) has gained popularity to promote muscle recovery, despite limited data on the optimal heat dose. The purpose of this study was to compare the responses of two exogenous heat strains on core body temperature, hemodynamic adjustments, and key functional markers of muscle recovery following exercise-induced muscle damage (EIMD). METHODS Twenty-eight physically active males completed an individually tailored EIMD protocol immediately followed by one of the following recovery interventions: HWI (40°C, HWI40 ), HWI (41°C, HWI41 ) or warm water immersion (36°C, CON36 ). Gastrointestinal temperature (Tgi ), hemodynamic adjustments (cardiac output [CO], mean arterial pressure [MAP], and systemic vascular resistance [SVR]), pre-frontal cortex deoxyhemoglobin (HHb), ECG-derived respiratory frequency, and subjective perceptual measures were tracked throughout immersion. In addition, functional markers of muscle fatigue (maximal concentric peak torque [Tpeak ]) and muscle damage (late-phase rate of force development [RFD100-200 ]) were measured prior to EIMD (pre-), 24 h (post-24 h), and 48 h (post-48 h) post-EIMD. RESULTS By the end of immersion, HWI41 led to significantly higher Tgi values than HWI40 (38.8 ± 0.1 vs. 38.0°C ± 0.6°C, p < 0.001). While MAP was well maintained throughout immersion, only HWI41 led to increased (HHb) (+4.2 ± 1.47 μM; p = 0.005) and respiratory frequency (+4.0 ± 1.21 breath.min-1 ; p = 0.032). Only HWI41 mitigated the decline in RFD100-200 at post-24 h (-7.1 ± 31.8%; p = 0.63) and Tpeak at post-48 h (-3.1 ± 4.3%, p = 1). CONCLUSION In physically active males, maintaining a core body temperature of ~25 min within the range of 38.5°C-39°C has been found to be effective in improving muscle recovery, while minimizing the risk of excessive physiological heat strain.
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Affiliation(s)
- Benoît Sautillet
- Faculty of Sport Sciences, APERE Laboratory, UR 3300, University of Picardie Jules Verne, Amiens, France
| | - Nicolas Bourdillon
- Institute of Sport Sciences, University of Lausanne, Lausanne, Switzerland
| | - Grégoire P Millet
- Institute of Sport Sciences, University of Lausanne, Lausanne, Switzerland
| | - Fréderic Lemaître
- Faculty of Sport Sciences, CETAPS Laboratory, UR 3832, Normandy University, Rouen, France
| | - Maryne Cozette
- Faculty of Sport Sciences, APERE Laboratory, UR 3300, University of Picardie Jules Verne, Amiens, France
| | - Stéphane Delanaud
- PériTox UMR_I 01 laboratory, CURS-UPJV, F-80054, University of Picardie Jules Verne, Amiens, France
| | - Saïd Ahmaïdi
- Faculty of Sport Sciences, APERE Laboratory, UR 3300, University of Picardie Jules Verne, Amiens, France
| | - Guillaume Costalat
- Faculty of Sport Sciences, APERE Laboratory, UR 3300, University of Picardie Jules Verne, Amiens, France
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Kolinger D, Stastny P, Pisz A, Krzysztofik M, Wilk M, Tsoukos A, Bogdanis GC. High-Intensity Conditioning Activity Causes Localized Postactivation Performance Enhancement and Nonlocalized Performance Reduction. J Strength Cond Res 2024; 38:e1-e7. [PMID: 38085631 DOI: 10.1519/jsc.0000000000004590] [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: 12/18/2023]
Abstract
ABSTRACT Kolinger D, Stastny P, Pisz A, Krzysztofik M, Wilk M, Tsoukos A, and Bogdanis GC. High-intensity conditioning activity causes localized postactivation performance enhancement and nonlocalized performance reduction. J Strength Cond Res 38(1): e1-e7, 2024-This study aimed to examine whether a conditioning activity (CA) performed by the legs (barbell back squat) may cause postactivation performance enhancement (PAPE) on muscle groups other than leg extensors in isokinetic (eccentric [ECC] and concentric [CON]) and dynamic movement. Twelve male basketball players (age: 21.3 ± 3.2, body mass: 89.6 ± 14.1 kg, height: 187.4 ± 4.6 cm, and 1 repetition maximum (1RM) barbell back squat: 113 ± 21 kg) with previous resistance-training experience of at least 2 years, performed 3 sets of 3-4 repetitions of back-squats with submaximal load (60, 90, and 90% 1RM) as CA. Before and after the CA, they performed pretest and post-test in the form of countermovement jumps (CMJs) (localized) or explosive push-ups (EPUs) (nonlocalized) along with isokinetic flexion and extension at the knee (localized) or at the elbow (nonlocalized). The localized and nonlocalized protocols were divided into 2 days in a randomized order. The back squat as CA significantly increased peak torque (PT) (p < 0.05) in all CON and ECC muscle actions and average power per repetition (APPR) (p < 0.05) (all muscle actions except ECC flexion) of the localized isokinetic tests with large (>0.8) and medium (0.4-0.79) effect sizes and significantly decreased (p < 0.01) the PT and APPR (p < 0.01) of the nonlocalized isokinetic test in the ECC flexion. The CMJ and EPU tests showed no significant differences (p > 0.05) between premeasures and postmeasures of take-off height. The effect of PAPE seems to be specific to the muscles most involved in the CA, and the CA inhibits PT of subsequent muscle ECC contractions in muscles not involved in the CA.
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Affiliation(s)
- Dominik Kolinger
- Department of Sports Games, Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Petr Stastny
- Department of Sports Games, Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Anna Pisz
- Department of Sports Games, Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Michal Krzysztofik
- Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland; and
| | - Michal Wilk
- Department of Sports Games, Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Athanasios Tsoukos
- School of Physical Education and Sport Science, National and Kapodistrian University of Athens, Athens, Greece
| | - Gregory C Bogdanis
- School of Physical Education and Sport Science, National and Kapodistrian University of Athens, Athens, Greece
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10
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Teo WP, Tan CX, Goodwill AM, Mohammad S, Ang YX, Latella C. Brain activation associated with low- and high-intensity concentric versus eccentric isokinetic contractions of the biceps brachii: An fNIRS study. Scand J Med Sci Sports 2024; 34:e14499. [PMID: 37732821 DOI: 10.1111/sms.14499] [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: 05/15/2023] [Revised: 07/25/2023] [Accepted: 09/11/2023] [Indexed: 09/22/2023]
Abstract
Studies have shown that neural responses following concentric (CON) and eccentric (ECC) muscle contractions are different, which suggests differences in motor control associated with CON and ECC contractions. This study aims to determine brain activation of the left primary motor cortex (M1) and left and right dorsolateral prefrontal cortices (DLPFCs) during ECC and CON of the right bicep brachii (BB) muscle at low- and high-contraction intensities. Eighteen young adults (13M/5F, 21-35 years) were recruited to participate in one familiarization and two testing sessions in a randomized crossover design. During each testing session, participants performed either ECC or CON contractions of the BB (3 sets × 8 reps) at low- (25% of maximum ECC/CON, 45°/s) and high-intensity (75% of maximum ECC/CON, 45°/s) on an isokinetic dynamometer. Eleven-channel functional near-infrared spectroscopy was used to measure changes in oxyhemoglobin (O2 Hb) from the left M1, and left and right DLPFC during ECC and CON contractions. Maximum torque for ECC was higher than CON (43.3 ± 14.1 vs. 46.2 ± 15.7 N m, p = 0.025); however, no differences in O2 Hb were observed between contraction types at low or high intensities in measured brain regions. High-intensity ECC and CON contractions resulted in greater increases in O2 Hb of M1 and bilateral DLPFC compared to low-intensity ECC and CON contractions (p = 0.014). Our findings suggest no differences in O2 Hb responses between contraction types at high and low intensities. High-contraction intensities resulted in greater brain activation of the M1 and bilateral DLPFC, which may have implications for neurorehabilitation to increase central adaptations from exercise.
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Affiliation(s)
- Wei-Peng Teo
- Physical Education and Sport Science Academic Group, National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | - Clara Xinru Tan
- Physical Education and Sport Science Academic Group, National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | - Alicia M Goodwill
- Physical Education and Sport Science Academic Group, National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | - Saqif Mohammad
- Physical Education and Sport Science Academic Group, National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | - Yi-Xuan Ang
- Physical Education and Sport Science Academic Group, National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | - Christopher Latella
- Neurophysiology Research Laboratory, School of Medical and Health Sciences, Edith Cowan University, Perth, Western Australia, Australia
- School of Medical and Health Sciences, Centre for Human Performance, Edith Cowan University, Perth, Western Australia, Australia
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11
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Loturco I, Zabaloy S, Pereira LA, Moura TBMA, Mercer VP, Victor F, Zając A, Matusinski A, Freitas TT, Bishop C. Resistance Training Practices of Brazilian Olympic Sprint and Jump Coaches: Toward a Deeper Understanding of Their Choices and Insights (Part III). J Hum Kinet 2024; 90:183-214. [PMID: 38380293 PMCID: PMC10875694 DOI: 10.5114/jhk/182888] [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: 01/02/2024] [Accepted: 01/20/2024] [Indexed: 02/22/2024] Open
Abstract
In the final part of this three-article collection on the training strategies of Brazilian Olympic sprint and jump coaches, we provide a detailed description of the resistance training methods and exercises most commonly employed by these speed experts. Always with the objective of maximizing the sprint and jump capabilities of their athletes, these experienced coaches primarily utilize variable, eccentric, concentric, machine-based, isometric, complex, and isoinertial resistance training methods in their daily practices. Squats (in their different forms), Olympic weightlifting, ballistics, hip thrusts, lunges, calf raises, core exercises, leg curls, stiff-leg deadlifts, and leg extension are the most commonly prescribed exercises in their training programs, during both the preparatory and competitive periods. Therefore, the current manuscript comprehensively describes and examines these methods, with the additional aim of extrapolating their application to other sports, especially those where sprint speed is a key performance factor.
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Affiliation(s)
- Irineu Loturco
- NAR—Nucleus of High Performance in Sport, São Paulo, Brazil
- Department of Human Movement Sciences, Federal University of São Paulo, São Paulo, Brazil
- Department of Sport, Health, and Exercise Science, University of South Wales, Pontypridd, Wales, United Kingdom
| | - Santiago Zabaloy
- Faculty of Physical Activity and Sports, University of Flores, Buenos Aires, Argentina
| | | | | | | | | | - Adam Zając
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, Katowice, Poland
| | - Aleksander Matusinski
- Department of Exercise and Sport Performance, The Jerzy Kukuczka Academy of Physical Education in Katowice, Katowice, Poland
| | - Tomás T. Freitas
- NAR—Nucleus of High Performance in Sport, São Paulo, Brazil
- UCAM Research Center for High Performance Sport, UCAM Universidad Católica de Murcia, Murcia, Spain
- Facultad de Deporte, UCAM Universidad Católica de Murcia, Murcia, Spain
| | - Chris Bishop
- London Sport Institute, Middlesex University, London, United Kingdom
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12
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Qian Z, Ping L, Xuelin Z. Re‑examining the mechanism of eccentric exercise‑induced skeletal muscle damage from the role of the third filament, titin (Review). Biomed Rep 2024; 20:14. [PMID: 38124762 PMCID: PMC10731162 DOI: 10.3892/br.2023.1703] [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: 08/05/2023] [Accepted: 10/23/2023] [Indexed: 12/23/2023] Open
Abstract
Intense and unaccustomed eccentric exercise has been extensively studied for its ability to induce muscle damage. However, the underlying mechanism of this phenomenon still requires further clarification. This knowledge gap arises from the need for explanation of the eccentric contraction through the sliding filament theory. The two-filament sarcomere model, which is consisted of thin and thick filaments, forms the basis of the sliding filament theory. The mechanisms of concentric and isometric contractions at the cellular and molecular levels are effectively described by this model. However, when relying solely on the cross-bridge swing, the sliding filament theory fails to account for specific observations, such as the stability of the descending limb of the force-length relationship curve. Recent evidence indicated that titin and the extracellular matrix (ECM) may play a protective role by interacting with the thick and thin filaments. During an eccentric contraction, titin serves as a third filament in the sarcomere, which helps regulate changes in passive force. The two-filament sarcomere model has limitations in explaining eccentric contraction, thus this compensates for those shortcomings. The present review explored the potential of replacing the two-filament sarcomere model with a three-filament sarcomere model, incorporating thin filaments, thick filaments and titin. This revised model offers a more comprehensive explanation of eccentric contraction phenomena. Furthermore, the sliding filament theory was investigated in the context of the three-filament sarcomere model. The double-layer protection mechanism, which involves increased titin stiffness and the ECM during eccentric contraction was explored. This mechanism may enhance lateral force transmission between muscle fibers and the ECM, resulting in sarcolemma and ECM shear deformation. These findings provided insight into the mechanism of eccentric exercise-induced skeletal muscle damage. Considering the three-filament sarcomere model and the double-layer protection mechanism, the present review offered a more logical and comprehensive understanding of the mechanism behind eccentric exercise-induced muscle damage.
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Affiliation(s)
- Zhao Qian
- College of Physical Education, Qufu Normal University, Jining, Shandong 273165, P.R. China
| | - Liu Ping
- College of Physical Education, Qufu Normal University, Jining, Shandong 273165, P.R. China
| | - Zhang Xuelin
- College of Physical Education, Qufu Normal University, Jining, Shandong 273165, P.R. China
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13
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Yoshida R, Kasahara K, Murakami Y, Sato S, Tanaka M, Nosaka K, Nakamura M. Weekly minimum frequency of one maximal eccentric contraction to increase muscle strength of the elbow flexors. Eur J Appl Physiol 2024; 124:329-339. [PMID: 37505230 DOI: 10.1007/s00421-023-05281-6] [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: 06/04/2023] [Accepted: 07/15/2023] [Indexed: 07/29/2023]
Abstract
PURPOSE Our previous study showed that one 3-s maximal eccentric contraction a day performed 5 days a week for 4 weeks (5DW) increased maximal voluntary contraction (MVC) strength of the elbow flexors more than 10%. The present study examined whether muscle strength would still increase when the frequency was reduced to 2 days or 3 days per week. METHODS Twenty-six healthy young adults were recruited in the present study and placed to two groups (n = 13/group) based on the weekly frequency of the one 3-s maximal eccentric contraction for two (2DW) or three days per week (3DW) for 4 weeks. Changes in MVC-isometric, MVC-concentric, MVC-eccentric torque of the elbow flexors, and muscle thickness of biceps brachii and brachialis (MT) before and after the 4-week training were compared between 2DW and 3DW groups, and also compared to the 5DW group in the previous study. RESULTS The 2DW group showed no significant changes in MVC torque. Significant (P < 0.05) increases in MVC-concentric (2.5 ± 10.4%) and MVC-eccentric (3.9 ± 4.9%) torque were observed for the 3DW group, but the magnitude of the increase was smaller (P < 0.05) than that presented by the 5DW group (12.8 ± 9.6%, 12.2 ± 7.8%). No significant changes in MT were evident for any of the groups. CONCLUSION These results suggest that at least three days a week are necessary for the one 3-s maximal eccentric contraction to be effective for increasing muscle strength, and more frequent sessions in a week (e.g., 5 days) appear to induce greater increases in muscle strength.
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Affiliation(s)
- Riku Yoshida
- Department of Rehabilitation Medicine, Maniwa Orthopedics Clinic, Niigata, Niigata, 950-0871, Japan
| | - Kazuki Kasahara
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Niigata, 950-3198, Japan
| | - Yuta Murakami
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Niigata, 950-3198, Japan
| | - Shigeru Sato
- Department of Rehabilitation, Matsumura General Hospital, 1-1 Kotaroumachi, Taira, Iwaki, Fukushima, 970-8026, Japan
| | - Midori Tanaka
- Department of Rehabilitation, Takeda General Hospital, 3-27 Yamagamachi, Aizuwakamatsu, Fukushima, 965-8585, Japan
| | - Kazunori Nosaka
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Niigata, 950-3198, Japan
| | - Masatoshi Nakamura
- Centre for Human Performance, School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, 6027, Australia.
- Faculty of Rehabilitation Sciences, Nishi Kyushu University, 4490-9 Ozaki, Kanzaki, Saga, 842-8585, Japan.
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14
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Wang Y, Sun Y, Yang C, Han B, Wang S. Sodium salicylate ameliorates exercise-induced muscle damage in mice by inhibiting NF-kB signaling. J Orthop Surg Res 2023; 18:967. [PMID: 38098039 PMCID: PMC10722820 DOI: 10.1186/s13018-023-04433-w] [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] [Received: 07/28/2023] [Accepted: 12/01/2023] [Indexed: 12/17/2023] Open
Abstract
BACKGROUND Eccentric muscle contraction can cause muscle damage, which reduces the efficiency of exercise. Previous evidence suggested that Sodium salicylate (SS) could improve the repair of aged muscle. This study intends to investigate whether SS can impact skeletal muscle damage caused by eccentric exercise. METHODS Eccentric treadmill exercise was performed to induce muscle damage in mice. Plasma levels of muscle damage markers were estimated. RT-qPCR was employed for detecting mRNA levels of proinflammatory mediators in murine gastrocnemius muscle. Immunofluorescence staining of laminin/DAPI was utilized for quantifying centrally nucleated myofibers in the gastrocnemius muscle. Western blotting was implemented to examine protein levels of mitsugumin 53 (MG53), matrix metalloproteinase (MMP)-2/9, and NF-κB signaling-related markers. RESULTS SS administration reduced muscle damage marker production in the plasma and decreased the levels of proinflammatory mediators, MG53 and MMP-2/9 in mice after exercise. SS alleviated the severity of muscle damage in the gastrocnemius of mice after eccentric exercise. SS blocked NF-κB signaling pathway in the gastrocnemius muscle. CONCLUSION SS administration ameliorates skeletal muscle damage caused by eccentric exercise in the mouse model.
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Affiliation(s)
- Yiming Wang
- Department of Sports, Northeastern University, Lane 3, Wenhua Road, Heping District, Shenyang City, 110819, China.
| | - Yuning Sun
- Department of Sports, Northeastern University, Lane 3, Wenhua Road, Heping District, Shenyang City, 110819, China
| | - Chunhui Yang
- Department of Sports, Northeastern University, Lane 3, Wenhua Road, Heping District, Shenyang City, 110819, China
| | - Bing Han
- Department of Sports, Northeastern University, Lane 3, Wenhua Road, Heping District, Shenyang City, 110819, China
| | - Sining Wang
- Department of General, Huanggu District People's Government Office, Shenyang City, 110032, China
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15
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Fornaziero AM, Novack LF, Nascimento VB, Osiecki R. Acute Responses of Youth Elite Players to a Football Match in Terms of Blood Markers. Sports (Basel) 2023; 11:242. [PMID: 38133109 PMCID: PMC10747386 DOI: 10.3390/sports11120242] [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: 09/20/2023] [Revised: 11/12/2023] [Accepted: 12/07/2023] [Indexed: 12/23/2023] Open
Abstract
The current study verified the acute responses of participants to a football match in terms of blood markers. Sixteen elite U-18 male football players were divided into two groups: experimental (EG, n = 10), who played a friendly football match; and control (CG), who were not exposed to any physical exertion. Intravenous blood samples were collected from both groups at baseline, pre-match, half-time, and post-match. The blood analysis consisted of four groups: immunological (leukocytes, platelets, and cortisol), muscle damage (creatine kinase and lactate dehydrogenase), metabolic (lactate, glucose, erythrocytes, hematocrit, hemoglobin, and urea), and electrolytic (sodium, calcium, and potassium). Edwards' training impulse demonstrated that the first half was more demanding than the second half (p = 0.020). Significant changes between time points and groups were observed for leukocytes (pre-match: 6920 ± 1949; post-match: 13,890 ± 3292; p ≤ 0.05) and cortisol (pre-match: 10.78 ± 3.63; post-match: 19.15 ± 7.40; p ≤ 0.05). CK (pre-match: 516.50 ± 248.38; post-match: 713.70 ± 308.20; p ≤ 0.05) and LDH (pre-match: 348.80 ± 36.49; post-match: 414.80 ± 26.55; p ≤ 0.05) increased significantly across the time points for the EG, with no difference between the groups, however. Raised lactate (pre-match: 1.05 ± 0.32; post-match: 3.24 ± 1.60; p ≤ 0.05) and glucose (pre-match: 72.54 ± 9.76; post-match: 101.42 ± 19.87; p ≤ 0.05) differences between the groups at half-time were also observed. These current findings provide helpful information to better understand football match demands regarding physiological effects.
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Affiliation(s)
- André Montanholi Fornaziero
- Department of Physical Education, Federal University of Parana (UFPR), Curitiba 81531-980, Brazil; (L.F.N.); (V.B.N.); (R.O.)
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16
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Pakosz P, Konieczny M, Domaszewski P, Dybek T, Gnoiński M, Skorupska E. Comparison of concentric and eccentric resistance training in terms of changes in the muscle contractile properties. J Electromyogr Kinesiol 2023; 73:102824. [PMID: 37696055 DOI: 10.1016/j.jelekin.2023.102824] [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: 04/07/2023] [Revised: 06/29/2023] [Accepted: 09/06/2023] [Indexed: 09/13/2023] Open
Abstract
The habitual use of resistance exercises involving concentric and eccentric contractions can increase muscle strength, speed and endurance. However, current knowledge has limited potential to fully understand the application of such resistance training and the muscle changes that occur to differentiate these two types of training. The aim of this study was to compare the effects of concentric contraction (CON) and eccentric contraction (ECC) during an acute bout of resistance training on the hamstring contractile properties. A group of 20 female recreational athletes were divided into two equal groups, CON training and ECC training. The contractile properties of the muscles on both sides of the body were assessed using tensiomyography (TMG): biceps femoris (BF) and semitendinosus (ST). The muscles were assessed twice, before and after 10 maximal repetitions of either concentric or eccentric isotonic contractions. The results indicate a greater change in TMG parameters with ECC training, with p < 0.001 (Td and Tc). An acute bout of resistance training induces changes in the muscle hamstrings contractile properties in both CON and ECC training. Eccentric training causes greater changes than concentric training, shortening contraction time (Td, Tc), increase radial displacement velocity (Vrd) and affecting changes in muscle belly displacement (Dm), so may be more effective in training.
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Affiliation(s)
- Paweł Pakosz
- Faculty of Physical Education and Physiotherapy, Opole University of Technology, Opole, Poland.
| | - Mariusz Konieczny
- Faculty of Physical Education and Physiotherapy, Opole University of Technology, Opole, Poland
| | - Przemysław Domaszewski
- Department of Health Sciences, Institute of Health Sciences, University of Opole, Opole, Poland
| | - Tomasz Dybek
- Faculty of Physical Education and Physiotherapy, Opole University of Technology, Opole, Poland
| | | | - Elżbieta Skorupska
- Department of Physiotherapy, Poznan University of Medical Sciences, Poznań, Poland
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17
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Vila-Chã C, Bovolini A, Francisco C, Costa-Brito AR, Vaz C, Rua-Alonso M, de Paz JA, Vieira T, Mendonca GV. Acute effects of isotonic eccentric exercise on the neuromuscular function of knee extensors vary according to the motor task: impact on muscle strength profiles, proprioception and balance. Front Sports Act Living 2023; 5:1273152. [PMID: 38022776 PMCID: PMC10655025 DOI: 10.3389/fspor.2023.1273152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 10/18/2023] [Indexed: 12/01/2023] Open
Abstract
Introduction Eccentric exercise has often been reported to result in muscle damage, limiting the muscle potential to produce force. However, understanding whether these adverse consequences extend to a broader, functional level is of apparently less concern. In this study, we address this issue by investigating the acute and delayed effects of supramaximal isotonic eccentric exercise on neuromuscular function and motor performance of knee extensors during tasks involving a range of strength profiles, proprioception, and balance. Methods Fifteen healthy volunteers (23.2 ± 2.9 years old) performed a unilateral isotonic eccentric exercise of the knee extensors of their dominant lower limb (4 × 10 reps at 120% of one Repetition Maximum (1RM)). The maximum voluntary isometric contraction (MVC), rate of force development (RFD), force steadiness of the knee extensors, as well as knee joint position sense and mediolateral (MLI) and anteroposterior stability (API) of the dominant lower limb, were measured pre-, immediately, and 24 h after the eccentric exercise. The EMG amplitude of the vastus medialis (VM) and biceps femoris (BF) were concomitantly evaluated. Results MVC decreased by 17.9% immediately after exercise (P < 0.001) and remained reduced by 13.6% 24 h following exercise (P < 0.001). Maximum RFD decreased by 20.4% immediately after exercise (P < 0.001) and remained reduced by 15.5% at 24 h (P < 0.001). During the MVC, EMG amplitude of the VM increased immediately after exercise while decreasing during the RFD task. Both values returned to baseline 24 h after exercise. Compared to baseline, force steadiness during submaximal isometric tasks reduced immediately after exercise, and it was accompanied by an increase in the EMG amplitude of the VM. MLI and knee joint position sense were impaired immediately after isotonic eccentric exercise (P < 0.05). While MLI returned to baseline values 24 h later, the absolute error in the knee repositioning task did not. Discussion Impairments in force production tasks, particularly during fast contractions and in the knee joint position sense, persisted 24 h after maximal isotonic eccentric training, revealing that neuromuscular functional outputs were affected by muscle fatigue and muscle damage. Conversely, force fluctuation and stability during the balance tasks were only affected by muscle fatigue since fully recovered was observed 24 h following isotonic eccentric exercise.
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Affiliation(s)
- Carolina Vila-Chã
- Laboratory for the Assessment of Sports Performance, Physical Exercise and Health (Labmov), Polytechnic of Guarda, Guarda, Portugal
- Research Center in Sports Sciences, Health Sciences, and Human Development, Vila Real, Portugal
| | - Antonio Bovolini
- Laboratory for the Assessment of Sports Performance, Physical Exercise and Health (Labmov), Polytechnic of Guarda, Guarda, Portugal
- Research Center in Sports Sciences, Health Sciences, and Human Development, Vila Real, Portugal
| | - Cristiana Francisco
- Laboratory for the Assessment of Sports Performance, Physical Exercise and Health (Labmov), Polytechnic of Guarda, Guarda, Portugal
| | - Ana R. Costa-Brito
- Laboratory for the Assessment of Sports Performance, Physical Exercise and Health (Labmov), Polytechnic of Guarda, Guarda, Portugal
| | - Cláudia Vaz
- Laboratory for the Assessment of Sports Performance, Physical Exercise and Health (Labmov), Polytechnic of Guarda, Guarda, Portugal
| | - María Rua-Alonso
- Laboratory for the Assessment of Sports Performance, Physical Exercise and Health (Labmov), Polytechnic of Guarda, Guarda, Portugal
- Research Center in Sports Sciences, Health Sciences, and Human Development, Vila Real, Portugal
- Performance and Health Group, Department of Physical Education and Sport, Faculty of Sports Sciences and Physical Education, University of A Coruna, A Coruña, Spain
| | | | - Taian Vieira
- Laboratorio di Ingegneria del Sistema Neuromuscolare (LISiN), Dipartimento di Elettronica e Telecomunicazioni, Politecnico di Torino, Turin, Italy
- PoliToBIOMed Lab, Politecnico di Torino, Turin, Italy
| | - Goncalo V. Mendonca
- Neuromuscular Research Laboratory, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
- Interdisciplinary Center for the Study of Human Performance (CIPER), Faculdade de Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
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18
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Notley SR, Mitchell D, Taylor NAS. A century of exercise physiology: concepts that ignited the study of human thermoregulation. Part 1: Foundational principles and theories of regulation. Eur J Appl Physiol 2023; 123:2379-2459. [PMID: 37702789 DOI: 10.1007/s00421-023-05272-7] [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: 12/30/2022] [Accepted: 06/30/2023] [Indexed: 09/14/2023]
Abstract
This contribution is the first of a four-part, historical series encompassing foundational principles, mechanistic hypotheses and supported facts concerning human thermoregulation during athletic and occupational pursuits, as understood 100 years ago and now. Herein, the emphasis is upon the physical and physiological principles underlying thermoregulation, the goal of which is thermal homeostasis (homeothermy). As one of many homeostatic processes affected by exercise, thermoregulation shares, and competes for, physiological resources. The impact of that sharing is revealed through the physiological measurements that we take (Part 2), in the physiological responses to the thermal stresses to which we are exposed (Part 3) and in the adaptations that increase our tolerance to those stresses (Part 4). Exercising muscles impose our most-powerful heat stress, and the physiological avenues for redistributing heat, and for balancing heat exchange with the environment, must adhere to the laws of physics. The first principles of internal and external heat exchange were established before 1900, yet their full significance is not always recognised. Those physiological processes are governed by a thermoregulatory centre, which employs feedback and feedforward control, and which functions as far more than a thermostat with a set-point, as once was thought. The hypothalamus, today established firmly as the neural seat of thermoregulation, does not regulate deep-body temperature alone, but an integrated temperature to which thermoreceptors from all over the body contribute, including the skin and probably the muscles. No work factor needs to be invoked to explain how body temperature is stabilised during exercise.
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Affiliation(s)
- Sean R Notley
- Defence Science and Technology Group, Department of Defence, Melbourne, Australia
- School of Human Kinetics, University of Ottawa, Ottawa, Canada
| | - Duncan Mitchell
- Brain Function Research Group, School of Physiology, University of the Witwatersrand, Johannesburg, South Africa
- School of Human Sciences, University of Western Australia, Crawley, Australia
| | - Nigel A S Taylor
- Research Institute of Human Ecology, College of Human Ecology, Seoul National University, Seoul, Republic of Korea.
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19
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Beato M, de Keijzer KL, Fleming A, Coates A, La Spina O, Coratella G, McErlain-Naylor SA. Post flywheel squat vs. flywheel deadlift potentiation of lower limb isokinetic peak torques in male athletes. Sports Biomech 2023; 22:1514-1527. [PMID: 33112722 DOI: 10.1080/14763141.2020.1810750] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 08/12/2020] [Indexed: 01/24/2023]
Abstract
The present study investigated the post-activation performance enhancement (PAPE) of isokinetic quadriceps and hamstrings torque after flywheel (FW)-squat vs. FW-deadlift in comparison to a control condition. Fifteen male athletes were enrolled in this randomised, crossover study. Each protocol consisted of 3 sets of 6 repetitions, with an inertial load of 0.029 kg.m2. Isokinetic quadriceps (knee extension) and hamstrings (knee flexion) concentric peak torque (60º/s) and hamstring eccentric peak torque (-60º/s) were measured 5 min after experimental or control conditions. A significant condition (PAPE) effect was reported (f = 4.067, p = 0.008) for isokinetic hamstrings eccentric peak torque following FW-squat and FW-deadlift, but no significant differences were found for quadriceps and hamstrings concentric peak torques. The significant difference averaged 14 Nm between FW-squat vs. control (95% CI: 2, 28; d = 0.75, moderate; p = 0.033), and 13 Nm between FW-deadlift vs. control (95% CI: 1, 25; d = 0.68, moderate; p = 0.038). This study reported that both FW-squat and FW-deadlift exercises are equivalently capable of generating PAPE of isokinetic hamstrings eccentric torque. Practitioners may use these findings to inform strength and power development during complex training sessions consisting of flywheel-based exercises prior to a sport-specific task.
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Affiliation(s)
- Marco Beato
- School of Health and Sports Sciences, University of Suffolk, Ipswich, UK
| | - Kevin L de Keijzer
- School of Health and Sports Sciences, University of Suffolk, Ipswich, UK
| | - Adam Fleming
- School of Health and Sports Sciences, University of Suffolk, Ipswich, UK
| | - Alexander Coates
- School of Health and Sports Sciences, University of Suffolk, Ipswich, UK
| | - Oscar La Spina
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
| | - Giuseppe Coratella
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
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20
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Núñez Silveira JM, Gallardo A, García-Valdés P, Ríos F, Rodriguez PO, Felipe Damiani L. Reverse triggering during mechanical ventilation: Diagnosis and clinical implications. Med Intensiva 2023; 47:648-657. [PMID: 37867118 DOI: 10.1016/j.medine.2023.10.009] [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: 08/11/2023] [Revised: 09/04/2023] [Accepted: 09/04/2023] [Indexed: 10/24/2023]
Abstract
This review addresses the phenomenon of "reverse triggering", an asynchrony that occurs in deeply sedated patients or patients in transition from deep to light sedation. Reverse triggering has been reported to occur in 30-90% of all ventilated patients. The underlying pathophysiological mechanisms remain unclear, but "entrainment" is proposed as one of them. Detecting this asynchrony is crucial, and methods such as visual inspection, esophageal pressure, diaphragmatic ultrasound and automated methods have been used. Reverse triggering may have effects on lung and diaphragm function, probably mediated by the level of breathing effort and eccentric activation of the diaphragm. The optimal management of reverse triggering has not been established, but may include the adjustment of ventilatory parameters as well as of sedation level, and in extreme cases, neuromuscular block. It is important to understand the significance of this condition and its detection, but also to conduct dedicated research to improve its clinical management and potential effects in critically ill patients.
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Affiliation(s)
- Juan M Núñez Silveira
- Servicio de Kinesiología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Adrián Gallardo
- Servicio de Kinesiología, Sanatorio Clínica Modelo de Morón, Morón, Buenos Aires, Argentina
| | - Patricio García-Valdés
- Departamento de Ciencias de la Salud, Carrera de Kinesiología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile; CardioREspirAtory Research Laboratory (CREAR), Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Fernando Ríos
- Casa Hospital San Juan De Dios, Ramos Mejía, Buenos Aires, Argentina
| | - Pablo O Rodriguez
- Unidad de Terapia Intensiva, Centro de Educación Médica e Investigaciones Clínicas (CEMIC), Buenos Aires, Argentina; Instituto Universitario CEMIC (IUC), Buenos Aires, Argentina
| | - L Felipe Damiani
- Departamento de Ciencias de la Salud, Carrera de Kinesiología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile; CardioREspirAtory Research Laboratory (CREAR), Pontificia Universidad Católica de Chile, Santiago, Chile.
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21
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Barreto RV, Lima LC, Borszcz FK, de Lucas RD, Denadai BS. Acute physiological responses to eccentric cycling: a systematic review and meta-analysis. J Sports Med Phys Fitness 2023; 63:1051-1068. [PMID: 37410446 DOI: 10.23736/s0022-4707.23.14971-1] [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: 07/07/2023]
Abstract
INTRODUCTION Eccentric cycling (ECCCYC) has attracted considerable interest due to its potential applicability for exercise treatment/training of patients with poor exercise tolerance as well as healthy and trained individuals. Conversely, little is known about the acute physiological responses to this exercise modality, thus challenging its proper prescription. This study aimed to provide precise estimates of the acute physiological responses to ECCCYC in comparison to traditional concentric cycling (CONCYC). EVIDENCE ACQUISITION Searches were performed until November 2021 using the PubMed, Embase, and ScienceDirect databases. Studies that examined individuals' cardiorespiratory, metabolic, and perceptual responses to ECCCYC and CONCYC sessions were included. Bayesian multilevel meta-analysis models were used to estimate the population mean difference between acute physiological responses from ECCCYC and CONCYC bouts. Twenty-one studies were included in this review. EVIDENCE SYNTHESIS The meta-analyses showed that ECCCYC induced lower cardiorespiratory (i.e., V̇O2, V̇E, and HR), metabolic (i.e., [BLa]), and perceptual (i.e., RPE) responses than CONCYC performed at the same absolute power output, while greater cardiovascular strain (i.e., greater increases in HR, Q, MAP, [norepinephrine], and lower SV) was detected when compared to CONCYC performed at the same V̇O2. CONCLUSIONS The prescription of ECCCYC based on workloads used in the CONCYC sessions may be considered safe and, therefore, feasible for the rehabilitation of individuals with poor exercise tolerance. However, the prescription of ECCCYC based on the V̇O2 obtained during CONCYC sessions should be conducted with caution, especially in clinical settings, since there is a high probability of additional cardiovascular overload in this condition.
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Affiliation(s)
- Renan V Barreto
- Human Performance Laboratory, Department of Physical Education, São Paulo State University, Rio Claro, Brazil -
| | - Leonardo Cr Lima
- School of Physical Education and Sport of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Fernando K Borszcz
- Physical Effort Laboratory, Sports Center, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Ricardo D de Lucas
- Physical Effort Laboratory, Sports Center, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Benedito S Denadai
- Human Performance Laboratory, Department of Physical Education, São Paulo State University, Rio Claro, Brazil
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22
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Szűcs G, Pipicz M, Szabó MR, Csont T, Török L, Csonka C. Effect of Eccentric Exercise on Metabolic Health in Diabetes and Obesity. SPORTS MEDICINE - OPEN 2023; 9:91. [PMID: 37775653 PMCID: PMC10541389 DOI: 10.1186/s40798-023-00596-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 06/12/2023] [Indexed: 10/01/2023]
Abstract
There is a growing body of evidence showing the importance of physical activity against civilization-induced metabolic diseases, including type 2 diabetes (T2DM) and obesity. Eccentric contraction, when skeletal muscles generate force by lengthening, is a unique type of skeletal muscle activity. Eccentric contraction may lead to better power production characteristics of the muscle because eccentric contraction requires less energy and can result in higher tension. Therefore, it is an ideal tool in the rehabilitation program of patients. However, the complex metabolic effect (i.e., fat mass reduction, increased lipid oxidation, improvement in blood lipid profile, and increased insulin sensitivity) of the eccentric contraction alone has scarcely been investigated. This paper aims to review the current literature to provide information on whether eccentric contraction can influence metabolic health and body composition in T2DM or obesity. We also discussed the potential role of myokines in mediating the effects of eccentric exercise. A better understanding of the mechanism of eccentric training and particularly their participation in the regulation of metabolic diseases may widen their possible therapeutic use and, thereby, may support the fight against the leading global risks for mortality in the world.
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Affiliation(s)
- Gergő Szűcs
- Metabolic Diseases and Cell Signaling (MEDICS) Research Group, Department of Biochemistry, Albert Szent-Györgyi Medical School, University of Szeged, Dóm tér 9, Szeged, 6720, Hungary
- Centre of Excellence for Interdisciplinary Research, Development and Innovation of the University of Szeged, 6720, Szeged, Hungary
| | - Márton Pipicz
- Metabolic Diseases and Cell Signaling (MEDICS) Research Group, Department of Biochemistry, Albert Szent-Györgyi Medical School, University of Szeged, Dóm tér 9, Szeged, 6720, Hungary
- Centre of Excellence for Interdisciplinary Research, Development and Innovation of the University of Szeged, 6720, Szeged, Hungary
| | - Márton Richárd Szabó
- Metabolic Diseases and Cell Signaling (MEDICS) Research Group, Department of Biochemistry, Albert Szent-Györgyi Medical School, University of Szeged, Dóm tér 9, Szeged, 6720, Hungary
- Centre of Excellence for Interdisciplinary Research, Development and Innovation of the University of Szeged, 6720, Szeged, Hungary
| | - Tamás Csont
- Metabolic Diseases and Cell Signaling (MEDICS) Research Group, Department of Biochemistry, Albert Szent-Györgyi Medical School, University of Szeged, Dóm tér 9, Szeged, 6720, Hungary
- Centre of Excellence for Interdisciplinary Research, Development and Innovation of the University of Szeged, 6720, Szeged, Hungary
| | - László Török
- Department of Traumatology, Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis utca 6, Szeged, 6720, Hungary
- Department of Sports Medicine, Albert Szent-Györgyi Medical School, University of Szeged, Tisza Lajos krt. 107, Szeged, 6720, Hungary
| | - Csaba Csonka
- Metabolic Diseases and Cell Signaling (MEDICS) Research Group, Department of Biochemistry, Albert Szent-Györgyi Medical School, University of Szeged, Dóm tér 9, Szeged, 6720, Hungary.
- Centre of Excellence for Interdisciplinary Research, Development and Innovation of the University of Szeged, 6720, Szeged, Hungary.
- Department of Sports Medicine, Albert Szent-Györgyi Medical School, University of Szeged, Tisza Lajos krt. 107, Szeged, 6720, Hungary.
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23
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Akınoğlu B, Paköz B, Yilmaz AE, Shehu SU, Kocahan T. Effect of contraction type at varying angular velocities on isokinetic muscle strength training. J Exerc Rehabil 2023; 19:228-236. [PMID: 37662526 PMCID: PMC10468290 DOI: 10.12965/jer.2346236.118] [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: 05/22/2023] [Accepted: 06/12/2023] [Indexed: 09/05/2023] Open
Abstract
The aim of this study is to determine whether concentric and eccentric isokinetic training performed at certain angular velocities in sedentary individuals is effective only in the angular velocities and contraction type where the training is performed, or at other angular velocities and contraction types that are not being trained. Twenty-eight sedentary individuals (matched according to weight, age and gender) volunteered to participate in this case study. The study was conducted on a total of 56 extremities belonging to 28 individuals (14 women, 14 men) aged between 24 and 60 years. Concentric and eccentric strength tests were performed at 30-60-90-120-150-180°/sec. The participants were randomly divided into two groups as concentric training group and eccentric training group, through stratified randomization matching. The training was done 3 days a week for a total of 6 weeks. At the end of the study, no difference was found between the pre- and posttraining measurements in the concentric training group (P>0.05). In the eccentric training group, the eccentric muscle strength of the knee flexors and extensors at angular velocity of 90°/sec, the eccentric strength of the knee extensors at angular velocity of 120°/sec, and the eccentric muscle strength of the knee flexors at angular velocity of 180°/sec were found to be different and an increase was seen after the training (P=0.032, P=0.049, P=0.041, P=0.032). These results demonstrate that eccentric training may be preferred in cases where muscle strength increase is needed in short time.
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Affiliation(s)
- Bihter Akınoğlu
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Ankara Yıldırım Beyazıt University, Ankara,
Turkey
| | - Büşra Paköz
- Center of Athlete Training and Health Research, Department of Health Services, Sports General Directorship, The Ministry of Youth and Sports, Ankara,
Turkey
| | - Ayfer Ezgi Yilmaz
- Department of Statistics, Faculty of Science, Hacettepe University, Beytepe, Ankara,
Turkey
| | - Salman Usman Shehu
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Ankara Yıldırım Beyazıt University, Ankara,
Turkey
| | - Tuğba Kocahan
- Department of Sports Medicine, Gülhane Faculty of Medicine, Health Sciences University, Ankara,
Turkey
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24
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Jarosz J, Królikowska P, Matykiewicz P, Aschenbrenner P, Ewertowska P, Krzysztofik M. Effects of Flywheel vs. Free-Weight Squats and Split Squats on Jumping Performance and Change of Direction Speed in Soccer Players. Sports (Basel) 2023; 11:124. [PMID: 37505611 PMCID: PMC10386668 DOI: 10.3390/sports11070124] [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: 05/19/2023] [Revised: 06/13/2023] [Accepted: 06/21/2023] [Indexed: 07/29/2023] Open
Abstract
The objective of this study was to compare (i) The effects of a flywheel and free-weight resistance training program; and (ii) The effects of performing lateral and frontal split squats as part of a flywheel-resistance training program on jumping performance, the 5-0-5 change of direction test time, and the one-repetition maximum (1RM) back squat in soccer players. Twenty-four male amateur soccer players participated in this study and were randomly and equally assigned to one of three different test groups: forward split-squat group (FSQ); lateral split-squat group (LSQ); and free-weight training group (TRAD). Athletes in the FSQ group performed a squat and a forward split squat on a flywheel device, while those in the LSQ group performed a squat and a lateral split squat (instead of a forward split squat) on a flywheel device. Each training lasted 4 weeks. The main finding was that all training groups, such as TRAD, FSQ, and LSQ, significantly improved broad jump length (p = 0.001; effect size [ES] = 0.36), 5-0-5 COD time with a turn on the dominant limb (p = 0.038; ES = 0.49), and 1RM back squat (p = 0.001; ES = 0.4). In turn, both flywheel-resistance training groups (FSQ and LSQ) significantly improved their counter-movement jump height (p = 0.001; ES = 0.8 and p = 0.002; ES = 0.58; respectively) with no effect in the TRAD (p = 0.676; ES = 0.07) training group. Both free-weight and flywheel-resistance training lasting 4 weeks performed in-season contributed to significant improvement in 1RM back squat, broad jump performance, and 5-0-5 change of direction testing time, while flywheel-resistance training might be superior in counter-movement jump height enhancement in soccer players. Moreover, the manner in which split squats were performed was not a factor influencing the obtained results.
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Affiliation(s)
- Jakub Jarosz
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland
| | - Paulina Królikowska
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland
| | - Patryk Matykiewicz
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland
| | - Piotr Aschenbrenner
- Department of Biomechanics and Sports Engineering, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland
| | - Paulina Ewertowska
- Division of Clinical Physiotherapy, Faculty of Physical Education, Gdansk University of Physical Education and Sport, 80-336 Gdańsk, Poland
| | - Michał Krzysztofik
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland
- Department of Sport Games, Faculty of Physical Education and Sport, Charles University in Prague, 110 00 Prague, Czech Republic
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25
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Bright TE, Handford MJ, Mundy P, Lake J, Theis N, Hughes JD. Building for the Future: A Systematic Review of the Effects of Eccentric Resistance Training on Measures of Physical Performance in Youth Athletes. Sports Med 2023; 53:1219-1254. [PMID: 37097414 PMCID: PMC10185653 DOI: 10.1007/s40279-023-01843-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/17/2023] [Indexed: 04/26/2023]
Abstract
BACKGROUND Eccentric resistance training is recognised as an effective stimulus for enhancing measures of muscular strength and power in adult populations; however, its value in youth athletes is currently not well understood. OBJECTIVE The aim of this systematic review was to critically appraise the effects of eccentric resistance training on measures of physical performance (i.e. muscular strength, jump, sprint and change of direction) in youth athletes 18 years of age and under. METHODS Original journal articles published between 1950 and June 2022 were retrieved from electronic search engines of PubMed, SPORTDiscus and Google Scholar's advanced search option. Full journal articles investigating the acute and chronic effects of eccentric resistance training on measures of physical performance in youth athletes (i.e. a person 18 years of age or under who competes in sport) were included. The methodological quality and bias of each study were assessed prior to data extraction using a modified Downs and Black checklist. RESULTS The search yielded 749 studies, of which 436 were duplicates. Three-hundred studies were excluded based upon title and abstract review and a further 5 studies were removed following the modified Downs and Black checklist. An additional 14 studies were identified during backward screening. Accordingly, 22 studies were included in our systematic review. The Nordic hamstring exercise and flywheel inertial training were the most frequently used eccentric resistance training methods in youth athletes. Improvements in physical performance following the Nordic hamstring exercise are dependent upon an increase in the breakpoint angle, rather than training volume (sets and repetitions), and are further elevated with the addition of hip extension exercises or high-speed running. A minimum of 3 familiarisation trials is necessary to elicit meaningful adaptations following flywheel inertial training. Furthermore, an emphasis should be placed upon decelerating the rotating flywheel during the final one to two thirds of the eccentric phase, rather than gradually throughout the entire eccentric phase. CONCLUSIONS The findings of this systematic review support the inclusion of eccentric resistance training in youth athletes to improve measures of muscular strength, jump, sprint and change of direction performance. The current eccentric resistance training methods are predominantly limited to the Nordic hamstring exercise and flywheel inertial training; however, the efficacy of accentuated eccentric loading to improve jump performance warrants attention in future investigations.
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Affiliation(s)
- Thomas E. Bright
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK
- School of Sport, Health and Wellbeing, Plymouth Marjon University, Derriford Rd, Plymouth, PL6 8BH UK
| | - Matthew J. Handford
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK
| | | | - Jason Lake
- Department of Sport and Exercise Sciences, Chichester University, Chichester, UK
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA Australia
| | - Nicola Theis
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK
| | - Jonathan D. Hughes
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK
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26
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Mesquita Souza RL, Aidar FJ, Villar R, Greco G, Santos LD, Poli L, Lima de Santana J, Carvutto R, Gama de Matos D, Badicu G, Silva AF, Clemente FM, Nobari H, Fischetti F, Cataldi S. Assessment of asymmetry at different intensities between conventional and paralympic powerlifting athletes. Heliyon 2023; 9:e16211. [PMID: 37251905 PMCID: PMC10213187 DOI: 10.1016/j.heliyon.2023.e16211] [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: 03/24/2023] [Revised: 05/09/2023] [Accepted: 05/10/2023] [Indexed: 05/31/2023] Open
Abstract
Powerlifting competitions require consistent and symmetric lifting of heavy loads and maximal effort, in which, asymmetric lifting results in trial invalidation. Symmetry during this very high intensity movement is determinant to athletes' performance and success in competitions. This study aimed to compare the asymmetry between Conventional Powerlifting athletes (CP) and Paralympic (PP) athletes at intensities of 45 and 80% 1RM before and after a training session. Twenty-two male athletes (11 CP: 29.84 ± 4.21 and 11 PP: 30.81 ± 8.05 years old) participated in this study. Mean Propulsive Velocity (MPV), Maximum Velocity (Vmax) and Power during the concentric and eccentric phases were evaluated at 45%-1RM before and after a training session. For the intensity of 80%-1RM, MPV, Vmax and Power were measured in the first and last series (5 series of 5 repetitions: 5X5) of a training session. PP athletes demonstrated lower velocity and greater symmetry at 45%-1RM, but higher velocity and less asymmetry at 80%-1RM, when compared to CP. The data indicated that PP athletes tend to be slower at lower intensities, faster at higher intensities in absolute values, and have greater symmetry than CP.
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Affiliation(s)
- Rafael Luiz Mesquita Souza
- Graduate Program of Physical Education, Federal University of Sergipe (UFS), São Cristovão 49100-000, Brazil
- Group of Studies and Research of Performance, Sport, Health and Paralympic Sports (GEPEPS), Federal University of Sergipe (UFS), São Cristovão 49100-000, Brazil
| | - Felipe J. Aidar
- Graduate Program of Physical Education, Federal University of Sergipe (UFS), São Cristovão 49100-000, Brazil
- Group of Studies and Research of Performance, Sport, Health and Paralympic Sports (GEPEPS), Federal University of Sergipe (UFS), São Cristovão 49100-000, Brazil
- Department of Physical Education, Federal University of Sergipe (UFS), São Cristovão 49100-000, Brazil
- Graduate Program of Physiological Science, Federal University of Sergipe (UFS), São Cristovão 49100-000, Brazil
- Cardiorespiratory & Physiology of Exercise Research Laboratory, Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Rodrigo Villar
- Cardiorespiratory & Physiology of Exercise Research Laboratory, Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Gianpiero Greco
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of Study of Bari, 70124 Bari, Italy
| | - Leonardo dos Santos
- Graduate Program of Physical Education, Federal University of Sergipe (UFS), São Cristovão 49100-000, Brazil
- Group of Studies and Research of Performance, Sport, Health and Paralympic Sports (GEPEPS), Federal University of Sergipe (UFS), São Cristovão 49100-000, Brazil
| | - Luca Poli
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of Study of Bari, 70124 Bari, Italy
| | - Jefferson Lima de Santana
- Cardiorespiratory & Physiology of Exercise Research Laboratory, Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Roberto Carvutto
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of Study of Bari, 70124 Bari, Italy
| | - Dihogo Gama de Matos
- Cardiorespiratory & Physiology of Exercise Research Laboratory, Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Georgian Badicu
- Department of Physical Education and Special Motricity, Transilvania University of Brasov, 500068 Brasov, Romania
| | - Ana Filipa Silva
- Sports and Leisure School, Polytechnic Institute of Viana do Castelo, Rua Escola Industrial e Comercial de Nun'Álvares, 4900-347 Viana do Castelo, Portugal
- Research Center in Sports Performance, Recreation, Innovation and Technology (SPRINT), 4960-320 Melgaço, Portugal
- The Research Centre in Sports Sciences, Health Sciences and Human Development (CIDESD), 5001-801 Vila Real, Portugal
| | - Filipe Manuel Clemente
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun'Álvares, 4900-347 Viana do Castelo, Portugal
- Instituto de Telecomunicações, Delegação da Covilhã, 1049-001 Lisboa, Portugal
| | - Hadi Nobari
- Faculty of Sport Sciences, University of Extremadura, 10003 Cáceres, Spain
| | - Francesco Fischetti
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of Study of Bari, 70124 Bari, Italy
| | - Stefania Cataldi
- Department of Translational Biomedicine and Neuroscience (DiBraiN), University of Study of Bari, 70124 Bari, Italy
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27
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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.
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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
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28
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Eccentric muscle contractions: from single muscle fibre to whole muscle mechanics. Pflugers Arch 2023; 475:421-435. [PMID: 36790515 PMCID: PMC10011336 DOI: 10.1007/s00424-023-02794-z] [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: 10/07/2022] [Revised: 01/24/2023] [Accepted: 02/01/2023] [Indexed: 02/16/2023]
Abstract
Eccentric muscle loading encompasses several unique features compared to other types of contractions. These features include increased force, work, and performance at decreased oxygen consumption, reduced metabolic cost, improved energy efficiency, as well as decreased muscle activity. This review summarises explanatory approaches to long-standing questions in terms of muscular contraction dynamics and molecular and cellular mechanisms underlying eccentric muscle loading. Moreover, this article intends to underscore the functional link between sarcomeric components, emphasising the fundamental role of titin in skeletal muscle. The giant filament titin reveals versatile functions ranging from sarcomere organisation and maintenance, providing passive tension and elasticity, and operates as a mechanosensory and signalling platform. Structurally, titin consists of a viscoelastic spring segment that allows activation-dependent coupling to actin. This titin-actin interaction can explain linear force increases in active lengthening experiments in biological systems. A three-filament model of skeletal muscle force production (mediated by titin) is supposed to overcome significant deviations between experimental observations and predictions by the classic sliding-filament and cross-bridge theories. Taken together, this review intends to contribute to a more detailed understanding of overall muscle behaviour and force generation-from a microscopic sarcomere level to a macroscopic multi-joint muscle level-impacting muscle modelling, the understanding of muscle function, and disease.
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29
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Buonsenso A, Centorbi M, Iuliano E, Di Martino G, Della Valle C, Fiorilli G, Calcagno G, di Cagno A. A Systematic Review of Flywheel Training Effectiveness and Application on Sport Specific Performances. Sports (Basel) 2023; 11:sports11040076. [PMID: 37104150 PMCID: PMC10144427 DOI: 10.3390/sports11040076] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 04/03/2023] Open
Abstract
The objective of this systematic review was to examine the effectiveness of flywheel training, which allows for the replication of specific sports movements, overloading both the concentric and eccentric phases. Inclusion criteria were injury prevention outcomes; ability in terms of strength, power, sprinting, jumping and change of direction; competitive athletes; and RCTs. Exclusion criteria were a lack of a control group and lack of baseline and/or follow-up data. The databases used were Web of Science, Scopus, PubMed, Cochrane Library, and Sage. The revised Cochrane risk-of-bias tool was used to assess the quality of the selected RCTs. The Oxford Centre for Evidence-Based Medicine 2011 Levels of Evidence was used. A PICOS (participants, intervention, comparators, study outcomes, and study design) approach was used to evaluate eligibility. A total of 21 RCTs with 8 to 54 participants in each study analyzed flywheel technology and its application in nine sports. The results showed that flywheel training is a good strategy to improve sports performance, providing variation in training methodologies and athletes’ adherence. Further studies are needed to define guidelines on training modality, weekly frequency, volume, and inertia load. Only a few studies have applied the flywheel device directly to overload specific multidirectional movements at different joint angles. This method is not exempt from criticalities, such as the cost and the ability to carry out only individual training.
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Methenitis S, Theodorou AA, Chatzinikolaou PN, Margaritelis NV, Nikolaidis MG, Paschalis V. The effects of chronic concentric and eccentric training on position sense and joint reaction angle of the knee extensors. Eur J Sport Sci 2023:1-11. [PMID: 36815692 DOI: 10.1080/17461391.2023.2184726] [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: 02/24/2023]
Abstract
The aim of the present study was to compare the effect of chronic concentric or eccentric training on position sense and joint reaction angle, in healthy, untrained young men. Twenty-four men were randomly assigned into a pure concentric (CT) or a pure eccentric (ET) group and performed for 8 weeks, one training session/week, 75 maximal knee extensors contractions. Before and 48 h after the first (W1) and the last (W8) training sessions, knee joint position sense and joint reaction angle were assessed at three different knee angles (i.e. 30°, 45° and 60°). At the same time points, indirect indices of exercise-induced muscle damage (EIMD) were evaluated (i.e. range of motion [ROM], optimal angle, maximum isometric, concentric and eccentric torques, delayed onset muscle soreness [DOMS] and blood creatine kinase concentrations [CK]). Forty-eight hours post W1, position sense, reaction angle and all EIMD indices were significantly changed for both groups (p < 0.05; η2: 0.125-0.618), however, greater alterations were observed after ET. Significant correlations were found, in both groups, between the training-induced changes of position sense, reaction angles and the changes of EIMD biomarkers (r: -0.855-0.825; p < 0.005). No significant changes were found 48 h post W8 for position sense, reaction angle and EIMD indices (p > 0.285) for both CT or ET groups. In conclusion, exercise-induced changes in position sense and reaction angle, were related to the magnitude of EIMD, and not by the type of muscle contraction per se. HighlightsExercise induced changes in position sense and reaction angle, were related to the magnitude of EIMD, and not by the type of muscle contraction per se.After the 1st training session eccentric exercise caused greater disturbances, compared to concentric exercise, in EIMD indices which caused concomitant disturbances to position sense and knee reaction angle.8 weeks of either eccentric or concentric training leads to preservation of position sense and knee reaction angle 48 h after maximal intensity exercise of either types of muscle contraction.
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Affiliation(s)
- S Methenitis
- School of Physical Education and Sport Science, National and Kapodistrian University of Athens, Athens, Greece.,Theseus, Physical Medicine and Rehabilitation Center, Athens, Greece
| | - A A Theodorou
- Department of Life Sciences, School of Sciences, European University, Nicosia, Cyprus
| | - P N Chatzinikolaou
- Department of Physical Education and Sport Science at Serres, Aristotle, University of Thessaloniki, Thessaloniki, Greece
| | - N V Margaritelis
- Department of Physical Education and Sport Science at Serres, Aristotle, University of Thessaloniki, Thessaloniki, Greece
| | - M G Nikolaidis
- Department of Physical Education and Sport Science at Serres, Aristotle, University of Thessaloniki, Thessaloniki, Greece
| | - V Paschalis
- School of Physical Education and Sport Science, National and Kapodistrian University of Athens, Athens, Greece
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Volpe-Fix AR, de França E, Silvestre JC, Thomatieli-Santos RV. The Use of Some Polyphenols in the Modulation of Muscle Damage and Inflammation Induced by Physical Exercise: A Review. Foods 2023; 12:foods12050916. [PMID: 36900433 PMCID: PMC10001084 DOI: 10.3390/foods12050916] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/11/2023] [Accepted: 02/16/2023] [Indexed: 02/24/2023] Open
Abstract
Food bioactive compounds (FBC) comprise a vast class of substances, including polyphenols, with different chemical structures, and they exert physiological effects on individuals who consume them, such as antioxidant and anti-inflammatory action. The primary food sources of the compounds are fruits, vegetables, wines, teas, seasonings, and spices, and there are still no daily recommendations for their intake. Depending on the intensity and volume, physical exercise can stimulate oxidative stress and muscle inflammation to generate muscle recovery. However, little is known about the role that polyphenols may have in the process of injury, inflammation, and muscle regeneration. This review aimed to relate the effects of supplementation with mentation with some polyphenols in oxidative stress and post-exercise inflammatory markers. The consulted papers suggest that supplementation with 74 to 900 mg of cocoa, 250 to 1000 mg of green tea extract for around 4 weeks, and 90 mg for up to 5 days of curcumin can attenuate cell damage and inflammation of stress markers of oxidative stress during and after exercise. However, regarding anthocyanins, quercetins, and resveratrol, the results are conflicting. Based on these findings, the new reflection that was made is the possible impact of supplementation associating several FBCs simultaneously. Finally, the benefits discussed here do not consider the existing divergences in the literature. Some contradictions are inherent in the few studies carried out so far. Methodological limitations, such as supplementation time, doses used, forms of supplementation, different exercise protocols, and collection times, create barriers to knowledge consolidation and must be overcome.
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Affiliation(s)
| | - Elias de França
- Interdisciplinary Postgraduate Program in Health Sciences, Universidade Federal de São Paulo, Sao Paulo 05508-070, Brazil
| | - Jean Carlos Silvestre
- Interdisciplinary Postgraduate Program in Health Sciences, Universidade Federal de São Paulo, Sao Paulo 05508-070, Brazil
- Campus Rosinha Viegas, Universidade Metropolitana de Santos, Santos 11045-002, Brazil
- Center for Applied Social Sciences, Universidade Católica de Santos, Santos 11015-002, Brazil
| | - Ronaldo Vagner Thomatieli-Santos
- Postgraduate Program in Psychobiology, Universidade Federal de São Paulo, Sao Paulo 05508-070, Brazil
- Interdisciplinary Postgraduate Program in Health Sciences, Universidade Federal de São Paulo, Sao Paulo 05508-070, Brazil
- Correspondence:
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Barreto RV, de Lima LCR, Borszcz FK, de Lucas RD, Denadai BS. Chronic Adaptations to Eccentric Cycling Training: A Systematic Review and Meta-Analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:2861. [PMID: 36833557 PMCID: PMC9957439 DOI: 10.3390/ijerph20042861] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/12/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
This study aimed to investigate the effects of eccentric cycling (ECCCYC) training on performance, physiological, and morphological parameters in comparison to concentric cycling (CONCYC) training. Searches were conducted using PubMed, Embase, and ScienceDirect. Studies comparing the effect of ECCCYC and CONCYC training regimens on performance, physiological, and/or morphological parameters were included. Bayesian multilevel meta-analysis models were used to estimate the population's mean difference between chronic responses from ECCCYC and CONCYC training protocols. Group levels and meta-regression were used to evaluate the specific effects of subjects and study characteristics. Fourteen studies were included in this review. The meta-analyses showed that ECCCYC training was more effective in increasing knee extensor strength, vastus lateralis fiber cross-sectional area, and six-minute walking distance compared to CONCYC. Moreover, ECCCYC was as effective as CONCYC in decreasing body fat percentage. CONCYC was more effective in increasing V˙O2max and peak power output attained during concentric incremental tests. However, group-level analyses revealed that ECCCYC was more effective than CONCYC in improving V˙O2max in patients with cardiopulmonary diseases. ECCCYC is a viable modality for exercise interventions aiming to improve parameters of muscle strength, hypertrophy, functional capacity, aerobic power, and body composition, with more advantages than CONCYC training in improving neuromuscular variables.
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Affiliation(s)
- Renan Vieira Barreto
- Human Performance Laboratory, Department of Physical Education, São Paulo State University, Rio Claro 13506-900, Brazil
| | | | - Fernando Klitzke Borszcz
- Physical Effort Laboratory, Sports Centre, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil
| | - Ricardo Dantas de Lucas
- Physical Effort Laboratory, Sports Centre, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil
| | - Benedito Sérgio Denadai
- Human Performance Laboratory, Department of Physical Education, São Paulo State University, Rio Claro 13506-900, Brazil
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Performance Outcomes Following Isoinertial or Machine-Based Training Interventions in Female Junior Tennis Players. Int J Sports Physiol Perform 2023; 18:123-134. [PMID: 36543172 DOI: 10.1123/ijspp.2022-0082] [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: 02/28/2022] [Revised: 08/31/2022] [Accepted: 09/19/2022] [Indexed: 12/24/2022]
Abstract
PURPOSE To evaluate changes in physical performance indicators after executing a flywheel or machine-based neuromuscular training program in young female tennis players. METHODS Twenty-four players were divided into a machine-based group (MG), flywheel group (FG), and control group. Countermovement jump (CMJ), sprint time (5, 10, and 15 m), change-of-direction (COD) performance (right and left), medicine-ball throws (overhead, forehand, and backhand), and serve velocity were included as tests at baseline, week 4, and week 8. RESULTS Both MG and FG largely improved from baseline to weeks 4 and 8 of training in CMJ (11.6, 10.6%; effect size [ES] = 1.24, 1.95). Also, sprint time 5 m and 10 m, COD performance-right, and COD performance-left improved moderately to very largely at week 4 in MG (-5.0% to -6.2%; ES = -1.79 to -4.19) and FG (-2.9% to -5.1%; ES = -1.13 to -1.64), respectively. Regarding medicine-ball throw, only FG improved moderately to very largely from weeks 4 to 8 in overhead (9.3%; ES = 1.46), forehand (8.0%; ES = 1.08), and backhand (6.1%; ES = 1.15). Serve velocity improved moderately from weeks 4 to 8 in MG (5.8%; ES = 0.87). CONCLUSIONS Four weeks of the tested programs seem sufficient to improve physical determinants in young female participants. Greater improvements in CMJ and medicine-ball throw following flywheel neuromuscular training indicate the importance of including exercises that emphasize the stretch-shortening cycle and involve the entire kinetic chain. Performing the same intervention with no load adjustments may stall or even decrease performance in some parameters from weeks 4 to 8.
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Le Sant G, Lecharte T, Goreau V, Nordez A, Gross R, Cattagni T. Motor performance, motor impairments, and quality of life after eccentric resistance training in neurological populations: A systematic review and meta-analyses. NeuroRehabilitation 2023; 53:33-50. [PMID: 37424484 DOI: 10.3233/nre-230035] [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] [Indexed: 07/11/2023]
Abstract
BACKGROUND Many overlapping factors impair motor performance and quality of life in neurological patients. Eccentric resistance training (ET) has potential benefits for improving motor performance and treating motor impairments better than some traditional rehabilitation approaches. OBJECTIVE To estimate the effect of ET in neurological settings. METHODS Seven databases were reviewed up to May 2022 according to PRSIMA guidelines to find randomized clinical trials involving adults with a neurological condition, who underwent ET as set by the American College of Sports Medicine. Motor performance (main outcome) was assessed as strength, power and capacities during activity. Secondary outcomes (impairments) were muscle structure, flexibility, muscle activity, tone, tremor, balance and fatigue. Tertiary outcomes were risk of fall, and self-reports of quality of life. RESULTS Ten trials were included, assessed using Risk of Bias 2.0 tool, and used to compute meta-analyses. Effective effects in favour of ET were found for strength and power, but not for capacities during activity. Mixed results were found for secondary and tertiary outcomes. CONCLUSION ET may be a promising intervention to better improve strength/power in neurological patients. More studies are needed to improve the quality of evidence underlying changes responsible for these results.
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Affiliation(s)
- Guillaume Le Sant
- Movement - Interactions - Performance (MIP), CHU Nantes, University of Nantes, Nantes, France
- School of Physiotherapy, IFM3, R, Saint-Sébastien-sur-Loire, France
| | - Thomas Lecharte
- Movement - Interactions - Performance (MIP), CHU Nantes, University of Nantes, Nantes, France
| | - Valentin Goreau
- Movement - Interactions - Performance (MIP), CHU Nantes, University of Nantes, Nantes, France
- School of Physiotherapy, IFM3, R, Saint-Sébastien-sur-Loire, France
| | - Antoine Nordez
- Movement - Interactions - Performance (MIP), CHU Nantes, University of Nantes, Nantes, France
- Institut Universitaire de France (IUF), Paris, France
| | - Raphaël Gross
- Movement - Interactions - Performance (MIP), CHU Nantes, University of Nantes, Nantes, France
| | - Thomas Cattagni
- Movement - Interactions - Performance (MIP), CHU Nantes, University of Nantes, Nantes, France
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Chang CC, Chiang CY. Using the Countermovement Jump Metrics to Assess Dynamic Eccentric Strength: A Preliminary Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:16176. [PMID: 36498250 PMCID: PMC9736282 DOI: 10.3390/ijerph192316176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/24/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Background: This study aimed to determine the validity and reliability of the countermovement jump (CMJ) as a dynamic eccentric (Ecc) strength test. Methods: Thirty-three college male student-athletes were recruited to participate in this study. The participants first performed CMJs with the second consisting of one repetition maximum back squat (1RM-BS) test. CMJ and 1RM-BS tests were performed on twin force plates. Results: The CMJ had significant correlations with the Ecc peak force (EccPF), and Ecc mean force (EccMF) of 1RM-BS, respectively (r = 0.61−0.69). Moreover, all parameters had a coefficient of variation (CV) < 10%. The intraclass correlation coefficient (ICC) values were moderate to excellent for each metric using the CMJ (0.94−0.97). The 1RM-BS and CMJ EccPF, EccMF Bland-Altman bias estimate variance ratio is 1.31−1.67, showing a moderate-large correlation in the Bland-Altman plot. Conclusions: CMJ ECC phase kinetics were associated with the 1RM-BS EccPF and EccMF. The CMJ can be an alternative tool for eccentric dynamic strength assessment.
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Affiliation(s)
- Chien-Chun Chang
- Graduate Institute of Athletics and Coaching Science, National Taiwan Sport University, Taoyuan 333, Taiwan
| | - Chieh-Ying Chiang
- Department of Sports Training Science-Combats, National Taiwan Sport University, Taoyuan 333, Taiwan
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Abstract
BACKGROUND Delayed onset muscle soreness (DOMS) is caused by unaccustomed exercise, especially eccentric exercise, and is highly likely to cause skeletal muscle injury. It mainly manifests as ultrastructural changes in skeletal muscle, as well as decreased muscle strength, muscle soreness, swelling, and elevated levels of creatine kinase (CK). Vibration training (VT) has been attracting increasing attention as a new type of rehabilitation therapy. It can effectively minimize the occurrence and relieve the symptoms of DOMS, reduce muscle stiffness and soreness, and reduce serum concentrations of CK and lactate dehydrogenase (LDH). This article systematically assessed the impact of VT on the mitigation of DOMS through a meta-analysis to provide updated evidence-based information. METHODS Electronic databases such as China Knowledge Network, VIP Electronics, PubMed, EBSCO, and Web of Science were searched to identify randomized controlled trials of VT on DOMS. Searches were performed from database creation to November 2021. The quality of the literature was assessed using the Cochrane Manual for the Systematic Review of Interventions, and meta-analyses were performed using RevMan 5.4 software. RESULTS VT intervention in DOMS was shown to effectively reduce subjective pain, improve pain tolerance, and accelerate the reduction of serum CK and LDH concentrations. Subgroup analysis of different test time periods showed that subjective pain decreased more significantly after 48 hours than after the other 2 time periods, and pain tolerance increased more significantly after 72 hours than the other 2 time periods; serum CK was significantly increased after 24 and 48 hours of intervention, but showed no significant change compared with the control group after 72 hours. Serum LDH decreased significantly after 24 hours of intervention, but there was no significant difference compared with the control group after 48 hours or 72 hours. CONCLUSION VT effectively reduced the subjective pain sensation after DOMS, increased the pain threshold, reduced serum LDH and CK concentrations, and accelerated muscle damage repair compared with control interventions. However, the effect of improving the range of motion of the joints is not clear and should be studied further. REGISTRATION number: INPLASY2021120115.
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Affiliation(s)
- Yikun Yin
- College of Physical and Health Education, Guangxi Normal University, Guilin, China
| | - Jialin Wang
- Institute of Sports Medicine and Health, Chengdu Sport University, Chengdu, China
| | - Kangqi Duan
- College of Physical and Health Education, Guangxi Normal University, Guilin, China
| | - Hejia Cai
- College of Physical and Health Education, Guangxi Normal University, Guilin, China
| | - Junzhi Sun
- Institute of Sports Medicine and Health, Chengdu Sport University, Chengdu, China
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Ličen U, Kozinc Ž. Using Shear-Wave Elastography to Assess Exercise-Induced Muscle Damage: A Review. SENSORS (BASEL, SWITZERLAND) 2022; 22:7574. [PMID: 36236672 PMCID: PMC9571996 DOI: 10.3390/s22197574] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 09/21/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
Shear-wave elastography is a method that is increasingly used to assess muscle stiffness in clinical practice and human health research. Recently, shear-wave elastography has been suggested and used to assess exercise-induced muscle damage. This review aimed to summarize the current knowledge of the utility of shear-wave elastography for assessment of muscle damage. In general, the literature supports the shear-wave elastography as a promising method for assessment of muscle damage. Increases in shear modulus are reported immediately and up to several days after eccentric exercise, while studies using shear-wave elastography during and after endurance events are showing mixed results. Moreover, it seems that shear modulus increases are related to the decline in voluntary strength loss. We recommend that shear modulus is measured at multiple muscles within a muscle group and preferably at longer muscle lengths. While further studies are needed to confirm this, the disruption of calcium homeostasis seems to be the primary candidate for the underlying mechanism explaining the increases in shear modulus observed after eccentric exercise. It remains to be investigated how well the changes in shear modulus correlate with directly assessed amount of muscle damage (biopsy).
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Affiliation(s)
- Urška Ličen
- Faculty of Health Sciences, University of Primorska, Polje 42, 6310 Izola, Slovenia
| | - Žiga Kozinc
- Faculty of Health Sciences, University of Primorska, Polje 42, 6310 Izola, Slovenia
- Andrej Marušič Institute, University of Primorska, Muzejski trg 2, 6000 Koper, Slovenia
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Piraino AB, Davis BM. The Management of Valgus Extension Overload Syndrome Experienced with Hitting in a High School Baseball Player: A Case Report. Int J Sports Phys Ther 2022; 17:1156-1169. [PMID: 36237658 PMCID: PMC9528722 DOI: 10.26603/001c.38168] [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: 02/22/2022] [Accepted: 06/27/2022] [Indexed: 11/05/2022] Open
Abstract
Background Valgus extension overload syndrome (VEOS) of the elbow is a condition associated with overhead athletes. However, the non-surgical management of these individuals is not well documented. Purpose To discuss the unique presentation, management, and outcomes of an adolescent baseball player with a chronic history of VEOS experienced during hitting. Case Description A 15-year-old right-handed high school baseball catcher presented with a six-month history of right-sided ulnar elbow pain. Elbow MRI w/ contrast was consistent with VEOS. The initial examination demonstrated excessive resting right-sided humeral external rotation compared to his left. Valgus stress testing in the subject's hitting position reproduced symptoms, which were alleviated with retest while correcting excessive humeral external rotation. Weakness of the humeral internal rotators and stiffness/shortness of the posterior shoulder were found and thought to relate to the humeral contribution to his elbow movement dysfunction. Rehabilitation emphasized addressing impairments contributing to excessive humeral external rotation with reintegration into batting. Outcomes After five weeks of physical therapy, the subject returned to soft toss hitting at approximately 75% velocity for the first time since symptom onset, without pain. At seven months after discharge, a phone conversation confirmed that the subject had returned to baseball without limitations. Discussion Despite the concept of 'regional interdependence', common proximal impairments are often assumed to contribute to elbow pain without a clear biomechanical rationale. Future research demonstrating the specific biomechanical effects of the shoulder on the elbow is needed, in addition to more accessible examination strategies to assess their relationship. Level of Evidence 5.
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Affiliation(s)
- Andrew B Piraino
- Houston Methodist Clear Lake Orthopedics & Sports Medicine, Friendswood, TX, USA; University of Southern California Division of Biokinesiology and Physical Therapy, Los Angeles, CA, USA
| | - Brent M Davis
- Houston Methodist Clear Lake Orthopedics & Sports Medicine, Friendswood, TX, USA
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Effect of Load on Muscle Activity, Kinematics, and Force Production During the Reverse Hyperextension Exercise. J Appl Biomech 2022; 38:336-345. [PMID: 36096478 DOI: 10.1123/jab.2022-0046] [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: 02/11/2022] [Revised: 06/27/2022] [Accepted: 08/03/2022] [Indexed: 11/18/2022]
Abstract
The reverse hyperextension exercise is used to strengthen posterior chain musculature without axially loading the spine; however, there are no suggestions for loading. Twenty recreationally active individuals (13 males and 7 females; aged 25.4 [2.5] y; height 1.76 [0.09] m; mass 79.3 [15.8] kg) performed 2 sets of 10 repetitions with 50%, 100%, and 150% of bodyweight. Surface electromyography measured erector spinae, gluteus maximus, and biceps femoris activity. Motions of the trunk, lower extremities, and reverse hyperextension exercise pendulum were tracked. A 1-way repeated-measures analysis of variance was used to analyze differences. Few differences were found between 100% and 150% loads; however, heavier loads resulted in increased hip (5.0°) and trunk (4.0°) flexion compared with the 50% load. Similar patterns emerged for peak and integrated muscle activity, with erector spinae and gluteus maximus activity greater in the 100% and 150% loads than in the 50% load, and biceps femoris activation increasing as load increased. Peak force significantly (P < .001) increased with 100% (28% [31%]) and 150% (34% [40%]) loads compared with the 50% load. Findings suggest the reverse hyperextension exercise targets posterior chain musculature, but increasing loads does not linearly increase force and muscle activation.
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Mao J, Wang T, Zhang L, Li Q, Bo S. Comparison of the acute physiological and perceptual responses between resistance-type and cycling high-intensity interval training. Front Physiol 2022; 13:986920. [PMID: 36160857 PMCID: PMC9500456 DOI: 10.3389/fphys.2022.986920] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 08/12/2022] [Indexed: 11/20/2022] Open
Abstract
Purpose: The purpose of the present study was to compare the acute physiological and perceptual responses between resistance-type high-intensity interval training (R-HIIT)and cycling high-intensity interval training (C-HIIT). Methods: Twelve healthy and active men randomly performed C-HIIT and R-HIIT. The C-HIIT protocol was performed on a cycle ergometer and consisted of ten 60 s working intervals at 90% PPO separated by a 60 s active recovery at 25% PPO. The R-HIIT protocol consisted of ten 60 s working intervals (barbell back squat with a load of 20% bodyweight, maximum 30 reps) separated by 60 s passive recovery period in an unloaded standing position. Oxygen consumption (V˙O2), heart rate (HR), energy expenditure (EE) and rating of perceived exertion (RPE) were measured during exercise. Blood lactate concentration (Blac), serum testosterone and cortisol, and heart rate variability (HRV) were measured before and after exercise. Results: Peak (p < 0.05) and average V˙O2 (p < 0.001), aerobic (p < 0.001) and total EE (p < 0.05) were higher during C-HIIT compared to R-HIIT. Blac after exercise (p < 0.05) and anaerobic glycolytic EE (p < 0.05) during exercise were higher in R-HIIT compared to C-HIIT. No differences (p > 0.05) in peak and average HR, serum testosterone and cortisol, HRV, and RPE responses were observed between C-HIIT and R-HIIT. Conclusion: The R-HIIT protocol can elicit similar cardiovascular, hormones, and perceptual responses as C-HIIT but with a higher contribution to the anaerobic glycolysis energy system. In contrast, C-HIIT is superior to R-HIIT for increasing oxygen consumption during exercise. Therefore, the two types of HIIT may lead to different metabolic and neuromuscular adaptations.
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Affiliation(s)
- Jun Mao
- College of Kinesiology and Health, Capital University of Physical Education and Sports, Beijing, China
| | - Tao Wang
- School of Physical Education, Liaocheng University, Liaocheng, China
| | - Li Zhang
- College of Kinesiology and Health, Capital University of Physical Education and Sports, Beijing, China
| | - Qing Li
- College of Kinesiology and Health, Capital University of Physical Education and Sports, Beijing, China
| | - Shumin Bo
- College of Kinesiology and Health, Capital University of Physical Education and Sports, Beijing, China
- *Correspondence: Shumin Bo,
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Dewolf A, Mesquita R, De Jaeger D. The effects of an increased step frequency on running economy and injury risk factors during downhill running. Sci Sports 2022. [DOI: 10.1016/j.scispo.2021.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Martín-Rivera F, Beato M, Alepuz-Moner V, Maroto-Izquierdo S. Use of concentric linear velocity to monitor flywheel exercise load. Front Physiol 2022; 13:961572. [PMID: 36035469 PMCID: PMC9412162 DOI: 10.3389/fphys.2022.961572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 07/18/2022] [Indexed: 11/13/2022] Open
Abstract
Purpose: To propose the concentric linear velocity measurement as a valid method to quantify load and individualise the prescription of flywheel training, we investigated the relationship between inertial load and mean concentric linear velocity (MCLV) during the flywheel squat exercise in a wide spectrum of intensities. In addition, we compared MCLV and subjective rating of perceived exertion (RPE) after each load. Methods: Twenty-five physically active men volunteered for this study (26.5 ± 2.9 years, 179.5 ± 4.2 cm, 81.6 ± 8.6 kg). After familiarization, all participants performed two inertial progressive load tests on separated days to determine the flywheel load-velocity profile and its reliability. Each participant performed 5 set of 6 repetitions of the flywheel squat exercise with different inertial loads (0.047, 0.104, 0.161, 0.245, 0.321 kg m2) selected in a counterbalanced and randomized order for each testing day. Average MCLV and RPE for each load were compared. Results: The inter-session intraclass correlation coefficient (ICC) showed values above 0.9 in all the included outcomes (MCLV: ICC = 0.91; RPE: ICC = 0.93). A significant correlation (p < 0.01, R2 = 0.80) between inertial load and MCLV was found. Similarly, significant correlation models (p < 0.01) were observed between RPE and load (R2 = 0.87) and (R2 = 0.71) between RPE and MCLV. Conclusion: The control of MCLV during flywheel exercise can be proposed as a valid method to quantify load and to individualize the prescription of flywheel training. In addition, RPE responses have demonstrated significant correlations with load and velocity. Therefore, RPE has been proposed as a valid and reliable alternative to control flywheel training.
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Affiliation(s)
- Fernando Martín-Rivera
- Research Group in Prevention and Health in Exercise and Sport, University of Valencia, Valencia, Spain
- *Correspondence: Fernando Martín-Rivera,
| | - Marco Beato
- School of Health and Sports Sciences, University of Suffolk, Ipswich, United Kingdom
- Institute of Health and Wellbeing, University of Suffolk, Ipswich, United Kingdom
| | | | - Sergio Maroto-Izquierdo
- Department of Health Sciences, European University Miguel de Cervantes, Valladolid, Spain
- Proporción A, Applied Sports Science Centre, Valladolid, Spain
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Influence of Menstrual Cycle on Leukocyte Response Following Exercise-Induced Muscle Damage. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19159201. [PMID: 35954552 PMCID: PMC9368082 DOI: 10.3390/ijerph19159201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 07/24/2022] [Accepted: 07/25/2022] [Indexed: 02/04/2023]
Abstract
We investigated the influence of the menstrual cycle (MC) on leukocyte response after exercise-induced muscle damage (EIMD). During the early follicular (E-FP, n = 12) or mid-luteal phase (M-LP, n = 12), 24 untrained females with eumenorrhea performed 60 eccentric exercises using nondominant arms. Blood samples were collected at pre- and 4, 48, and 96 h postexercise to analyze estradiol and progesterone concentrations, leukocyte count and fractionation, and creatine kinase (CK) activity. We also assessed the maximal voluntary isometric contraction torque of elbow flexion, range of motion in the elbow joint, upper-arm circumference, and muscle soreness as indirect muscle damage markers at pre-; immediately post-; and 4, 48, and 96 h postexercise. The percent change in neutrophil counts from pre- to 4 h postexercise was lower in M-LP than in E-FP (E-FP, 30.7% [15.9–65.7%] vs. M-LP, 10.3% [−2.3–30.0%]; median [interquartile range: 25–75%]; p = 0.068). Progesterone concentration at pre-exercise was significantly negatively correlated with the percent change in neutrophil counts from pre- to 4 h postexercise in M-LP (r = −0.650, p = 0.022). MC did not affect CK activity or other muscle damage markers. Thus, progesterone concentration rather than MC may be related to neutrophil response following EIMD.
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Susceptibility to movement-evoked pain following resistance exercise. PLoS One 2022; 17:e0271336. [PMID: 35862479 PMCID: PMC9302845 DOI: 10.1371/journal.pone.0271336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 06/29/2022] [Indexed: 11/19/2022] Open
Abstract
Objective To investigate the: (1) role of basic muscle pain sensitivity and psychological factors in the prediction of movement-evoked pain (MEP) following delayed onset muscle soreness (DOMS), and (2) association of MEP with changes in systemic muscle pain sensitivity following DOMS induction. Methods Fifty-one participants were assigned to either eccentric resistance exercise or control groups. They completed questionnaires evaluating psychological distress and underwent muscle pain sensitivity evaluation by the pressure pain threshold (PPT) test at the exercised and remote muscles, before and 24 hours following the intervention. MEP intensity was determined in response to lifting a 3kg canister using a visual analogue scale (VAS). Results The exercise group demonstrated MEP intensity of 5/10 on VAS and reduced PPTs at the main exercised muscle (p<0.001). A regression tree analyses revealed that the level of anxiety trait predicted a higher MEP intensity. A secondary analysis showed that 53% participants who were DOMS responders (MEP > mild intensity; ≥ 3/10 VAS) exhibited decreased PPTs in the exercised (p<0.001) and remote (p = 0.027) muscles following eccentric exercise. Characterization of DOMS responders revealed that, at baseline, they had lower PPTs in the exercised (p = 0.004) and remote (p = 0.001) muscles and reported higher psychological distress i.e., anxiety trait and depression symptoms (p<0.05), compared to non-responders. A regression analysis revealed that lower PPT or high levels of anxiety trait increased the probability to become a responder (p = 0.001). Conclusions Susceptibility to MEP following DOMS is determined by muscle pain hypersensitivity and high levels of anxiety trait. MEP at the early stage of DOMS is linked with an increase in systemic muscle pain sensitivity suggestive of central mechanisms. This knowledge is valuable in translating science into clinical musculoskeletal pain management.
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45
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Raya-González J, Castillo D, de Keijzer KL, Beato M. Considerations to Optimize Strength and Muscle Mass Gains Through Flywheel Resistance Devices: A Narrative Review. Strength Cond J 2022. [DOI: 10.1519/ssc.0000000000000732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Handford MJ, Bright TE, Mundy P, Lake J, Theis N, Hughes JD. The Need for Eccentric Speed: A Narrative Review of the Effects of Accelerated Eccentric Actions During Resistance-Based Training. Sports Med 2022; 52:2061-2083. [PMID: 35536450 DOI: 10.1007/s40279-022-01686-z] [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: 03/30/2022] [Indexed: 11/26/2022]
Abstract
Eccentric training as a method to enhance athletic performance is a topic of increasing interest to both practitioners and researchers. However, data regarding the effects of performing the eccentric actions of an exercise at increased velocities are limited. This narrative review aimed to provide greater clarity for eccentric methods and classification with regard to temporal phases of exercises. Between March and April 2021, we used key terms to search the PubMed, SPORTDiscus, and Google Scholar databases within the years 1950-2021. Search terms included 'fast eccentric', 'fast velocity eccentric', 'dynamic eccentric', 'accentuated eccentric loading', and 'isokinetic eccentric', analysing both the acute and the chronic effects of accelerated eccentric training in human participants. Review of the 26 studies that met the inclusion criteria identified that completing eccentric tempos of < 2 s increased subsequent concentric one repetition maximum performance, velocity, and power compared with > 4 s tempos. Tempos of > 4 s duration increased time under tension (TUT), whereas reduced tempos allowed for greater volume to be completed. Greater TUT led to larger accumulation of blood lactate, growth hormone, and testosterone when volume was matched to that of the reduced tempos. Overall, evidence supports eccentric actions of < 2 s duration to improve subsequent concentric performance. There is no clear difference between using eccentric tempos of 2-6 s if the aim is to increase hypertrophic response and strength. Future research should analyse the performance of eccentric actions at greater velocities or reduced time durations to determine more factors such as strength response. Tempo studies should aim to complete the same TUT for protocols to determine measures for hypertrophic response.
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Affiliation(s)
- Matthew J Handford
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK.
| | - Thomas E Bright
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK
- School of Sport, Health and Wellbeing, Plymouth Marjon University, Plymouth, UK
| | - Peter Mundy
- Faculty of Health and Life Sciences, Coventry University, Coventry, UK
| | - Jason Lake
- Chichester Institute of Sport, Nursing, and Allied Health, University of Chichester, Chichester, UK
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
| | - Nicola Theis
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK
| | - Jonathan D Hughes
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK
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Yildirim A, Belviranli M, Okudan N. Protective effect by low-intensity downhill running training against muscle damage and oxidative stress after high-intensity downhill running in rats. AN ACAD BRAS CIENC 2022; 94:e20200265. [PMID: 35507975 DOI: 10.1590/0001-3765202220200265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 02/14/2021] [Indexed: 11/22/2022] Open
Abstract
This study examined the effects of low-intensity eccentric exercise training performed before high-intensity eccentric exercise on muscle damage markers, oxidative stress and antioxidant defense. Twenty-two rats were divided into 3 groups; control (CON; n = 6), high-intensity eccentric exercise (HE; n = 8) and low-intensity eccentric exercise training plus high-intensity eccentric exercise (LET + HE; n = 8). Rats in the HE group performed HE at once. Rats in the LET + HE group performed LET and then HE protocol was applied. Blood and vastus intermedius muscle samples were taken 24 hours after the last exercise session for analyses of muscle damage, oxidative stress, and antioxidant defense markers. Muscle damage markers were higher in the HE group than the CON (137%-488%) and the LET + HE groups (82%-110%) (P < 0.05). Oxidative stress marker was higher in the HE group than the CON (65%) and the LET + HE (50%) groups (P < 0.05). Antioxidant defense markers were higher in the LTE + HE group than the HE group (39%-51%) (P < 0.05). In conclusion, low-intensity eccentric exercise training performed before high-intensity eccentric exercise conferred a protective effect against muscle damage by reducing oxidative stress and increasing antioxidant defense.
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Affiliation(s)
- Aysel Yildirim
- Selçuk University, Division of Sports Physiology, Department of Physiology, Faculty of Medicine, Selçuklu, 42131, Konya, Turkey
| | - Muaz Belviranli
- Selçuk University, Division of Sports Physiology, Department of Physiology, Faculty of Medicine, Selçuklu, 42131, Konya, Turkey
| | - Nilsel Okudan
- Selçuk University, Division of Sports Physiology, Department of Physiology, Faculty of Medicine, Selçuklu, 42131, Konya, Turkey
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48
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Li X, Xu Y. Role of Human-Computer Interaction Healthcare System in the Teaching of Physiology and Medicine. COMPUTATIONAL INTELLIGENCE AND NEUROSCIENCE 2022; 2022:5849736. [PMID: 35463243 PMCID: PMC9020908 DOI: 10.1155/2022/5849736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/20/2022] [Accepted: 03/31/2022] [Indexed: 11/17/2022]
Abstract
With the increasingly severe aging of the population, the difficult and expensive medical treatment problems are becoming more and more prominent; the salary level of domestic doctors is not high, but the cost of training doctors is high, coupled with doctors' work pressure and mental pressure; the number of candidates for medical school is decreasing year by year; medical talent is rare; and the allocation of medical staff is scarce. Health care is the basic guarantee for people's good life, and the shortage of medical staff will have many impacts on health care. Human-computer interaction (HCI) is the study of people, computers, and their interaction. HCI refers to the communication between the user and the computer system, which is the two-way information exchange of various symbols and actions between the human and the computer. The purpose of this paper is to study a healthcare system with human-computer interaction through the client, apply the system to the teaching of physiology and medicine, and analyze its effects and functions in combination with various evaluation indicators. This paper selects teaching content, ease of use of human-computer interaction design, technical services, and user subjective satisfaction as evaluation indicators, and constructs an evaluation model for this. And it builds the physiology and medicine teaching system framework and healthcare system, and conducts tests and statistics on the teaching system. This paper combines online questionnaires, in-app survey feedback, and field visits to collect feedback from users and administrators. The final data show that the teaching system meets the requirements in four evaluation indicators: teaching content, ease of use of human-computer interaction design, technical services, and user subjective satisfaction. User satisfaction with these four aspects reached 86.33%, 95.17%, 63.83%, and 81.87%, respectively. It shows that the system is more popular and can meet the needs of most users.
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Affiliation(s)
- Xiuhong Li
- Linfen Vocational and Technical College, Linfen 041000, Shanxi, China
| | - Yubo Xu
- School of Information Science and Technology, Xiamen University Tan Kah Kee College, Zhangzhou 363000, Fujian, China
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Combined Eccentric-Isokinetic and Isoinertial Training Leads to Large Ring-Specific Strength Gains in Elite Gymnasts. Sports (Basel) 2022; 10:sports10040049. [PMID: 35447859 PMCID: PMC9028779 DOI: 10.3390/sports10040049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/21/2022] [Accepted: 03/24/2022] [Indexed: 01/25/2023] Open
Abstract
In male elite gymnastics, lately, eccentric training is often used to improve the maximum specific strength of static elements on rings. Therefore, in this study, we aimed to investigate the effects of a three-week, gymnastic-specific, eccentric-isokinetic (0.1 m/s) cluster training with a change of stimulus after three of six training sessions (eccentric-isokinetic with additional load) on a computer-controlled training device on the improvement of the elements swallow and support scale on rings. Maximum strength and strength endurance in maintaining the static positions of ten international elite male gymnasts were determined on a weekly basis. After three weeks of training, specific maximum strength and strength endurance increased significantly (strength: swallow: +8.72%, p < 0.001; support scale: 8.32%, p < 0.0001; strength endurance: swallow: +122.36%; p = 0.02; Support Scale: +93.30%; p = 0.03). Consequently, top gymnasts can considerably improve ring-specific strength and strength endurance in only three weeks. The separate analysis of the effects of both eccentric-isokinetic training modalities showed that efficiency might even be increased in future training interventions. We suggest using this type of training in phases in which the technical training load is low and monitoring the adaptations in order to compile an individually optimized training after an intervention.
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50
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Engel T, Schraplau A, Wochatz M, Kopinski S, Sonnenburg D, Schomoeller A, Risch L, Kaplick H, Mayer F. Feasability of An Eccentric Isokinetic Protocol to Induce Trunk
Muscle Damage: A Pilot Study. Sports Med Int Open 2022; 6:E9-E17. [PMID: 35313534 PMCID: PMC8934203 DOI: 10.1055/a-1757-6724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 11/22/2021] [Indexed: 11/02/2022] Open
Abstract
AbstractEccentric exercise is discussed as a treatment option for clinical populations,
but specific responses in terms of muscle damage and systemic inflammation after
repeated loading of large muscle groups have not been conclusively
characterized. Therefore, this study tested the feasibility of an isokinetic
protocol for repeated maximum eccentric loading of the trunk muscles. Nine
asymptomatic participants (5 f/4 m;
34±6 yrs; 175±13 cm; 76±17 kg)
performed three isokinetic 2-minute all-out trunk strength tests (1x concentric
(CON), 2x eccentric (ECC1, ECC2), 2 weeks apart; flexion/extension,
60°/s, ROM 55°). Outcomes were peak torque, torque
decline, total work, and indicators of muscle damage and inflammation (over
168 h). Statistics were done using the Friedman test (Dunn’s
post-test). For ECC1 and ECC2, peak torque and total work were increased and
torque decline reduced compared to CON. Repeated ECC bouts yielded unaltered
torque and work outcomes. Muscle damage markers were highest after ECC1
(soreness 48 h, creatine kinase 72 h; p<0.05). Their
overall responses (area under the curve) were abolished post-ECC2 compared to
post-ECC1 (p<0.05). Interleukin-6 was higher post-ECC1 than CON, and
attenuated post-ECC2 (p>0.05). Interleukin-10 and tumor necrosis
factor-α were not detectable. All markers showed high inter-individual
variability. The protocol was feasible to induce muscle damage indicators after
exercising a large muscle group, but the pilot results indicated only weak
systemic inflammatory responses in asymptomatic adults.
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Affiliation(s)
- Tilman Engel
- University Outpatient Clinic, Sports Medicine & Sports
Orthopaedics, University of Potsdam, Potsdam, Germany
| | - Anne Schraplau
- University Outpatient Clinic, Sports Medicine & Sports
Orthopaedics, University of Potsdam, Potsdam, Germany
| | - Monique Wochatz
- University Outpatient Clinic, Sports Medicine & Sports
Orthopaedics, University of Potsdam, Potsdam, Germany
| | - Stephan Kopinski
- University Outpatient Clinic, Sports Medicine & Sports
Orthopaedics, University of Potsdam, Potsdam, Germany
| | - Dominik Sonnenburg
- University Outpatient Clinic, Sports Medicine & Sports
Orthopaedics, University of Potsdam, Potsdam, Germany
| | - Anne Schomoeller
- University Outpatient Clinic, Sports Medicine & Sports
Orthopaedics, University of Potsdam, Potsdam, Germany
| | - Lucie Risch
- University Outpatient Clinic, Sports Medicine & Sports
Orthopaedics, University of Potsdam, Potsdam, Germany
| | - Hannes Kaplick
- University Outpatient Clinic, Sports Medicine & Sports
Orthopaedics, University of Potsdam, Potsdam, Germany
| | - Frank Mayer
- University Outpatient Clinic, Sports Medicine & Sports
Orthopaedics, University of Potsdam, Potsdam, Germany
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