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Rabal-Pelay J, Gutiérrez H, Bascuas PJ, Pareja-Blanco F, Marco-Contreras LA. Load-Velocity Relationship in the Bulgarian Split-Squat Exercise. J Strength Cond Res 2024:00124278-990000000-00499. [PMID: 39074210 DOI: 10.1519/jsc.0000000000004897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/31/2024]
Abstract
ABSTRACT Rabal-Pelay, J, Gutiérrez, H, Bascuas, P-J, Pareja-Blanco, F, and Marco-Contreras, LA. Load-velocity relationship in the Bulgarian split-squat exercise. J Strength Cond Res XX(X): 000-000, 2024-The objective of the current research was to analyze the load-velocity relationship in the Bulgarian split-squat (BSS) exercise and to compare these relationships between the dominant and nondominant legs. Twenty-one strength-trained men (age: 27.3 ± 7.3 years) performed a progressive loading test in the BSS exercise using a Smith machine for each leg. The protocol began with a load of 30 kg, incrementally adding 10 kg until the mean propulsive velocity (MPV) fell below 0.4 m·s-1. At that point, 5 kg increments were employed, with a final addition of 2.5 kg for the last estimated attempt one-repetition maximum (1RM). A total of 324 lifts were analyzed. Subjects exhibited a relative strength ratio of 1.23 ± 0.10, a 1RM of 91.3 ± 14.2 kg, and a mean range of motion of 44.7 ± 3.7 cm. Polynomial regression analysis showed a robust relationship with an R2 value of 0.945 (ρ ≤ 0.001) between the relative load (%1RM) and MPV. Despite the differences in 1RM between the dominant and nondominant legs, there were no significant differences in MPV at the %1RM between both legs. These findings suggest that training intensity can be prescribed via the MPV during the BSS exercise. Moreover, the load-velocity relationship is stable between limbs despite the potential differences in absolute strength levels.
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Affiliation(s)
- Juan Rabal-Pelay
- Facultad de Ciencias de la Salud, Universidad San Jorge, Zaragoza, Spain
| | - Héctor Gutiérrez
- Facultad de Ciencias de la Salud, Universidad San Jorge, Zaragoza, Spain
| | | | - Fernando Pareja-Blanco
- Science-Based Training Research Group, Department of Sports and Computer Sciences, Universidad Pablo de Olavide, Seville, Spain; and
- Physical Performance & Sports Research Center, Universidad Pablo de Olavide, Seville, Spain
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Beato M, Bishop CJ, Turner AN. Editorial: Strength and conditioning in football: driving physical performance through research and innovation. Front Physiol 2024; 15:1437251. [PMID: 38903910 PMCID: PMC11187705 DOI: 10.3389/fphys.2024.1437251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Accepted: 05/29/2024] [Indexed: 06/22/2024] Open
Affiliation(s)
- Marco Beato
- School of Allied Health Sciences, University of Suffolk, Ipswich, United Kingdom
| | - Chris J. Bishop
- Faculty of Science and Technology, London Sport Institute, Middlesex University, London, United Kingdom
| | - Anthony N. Turner
- Faculty of Science and Technology, London Sport Institute, Middlesex University, London, United Kingdom
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Buoncristiani NA, Gerstner GR, Laffan MR, Trivisonno AJ, Mota JA, Giuliani-Dewig HK, Ryan ED. The impact of inter-limb leg lean tissue mass asymmetry on stair climb performance in career firefighters. ERGONOMICS 2024:1-7. [PMID: 38465900 DOI: 10.1080/00140139.2024.2327582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 02/20/2024] [Indexed: 03/12/2024]
Abstract
The purpose of this study was to examine the influence of inter-limb leg lean tissue mass (LTM) asymmetry on stair climb (SC) performance in firefighters. Forty-one career firefighters (age = 32.3 ± 8.2 years, body mass = 92.1 ± 18.6 kg, stature = 178.3 ± 7.9 cm) visited the laboratory on one occasion and completed a whole body and leg composition assessment followed by a timed and weighted SC task. Percent body fat (%BF) and leg LTM were determined during a DEXA scan and regional thigh analysis. Asymmetry was assessed by the percent difference between limbs (dominant limb LTM - non-dominant limb LTM)/dominant limb LTM × 100) and a ± 3% cut-off for asymmetry classification. Participants ascended and descended 26 stairs four times as quickly as possible while wearing a weighted (22 kg) vest. Point biserial correlations were used to assess the relationship of inter-limb leg LTM asymmetry and SC performance before and after controlling for age and %BF. Results indicated that inter-limb leg LTM asymmetry was associated with longer SC task time (poorer performance) both before (r = 0.432, P = 0.005) and after (r = 0.502, P = 0.001) controlling for age and %BF. Our findings indicated that inter-limb leg LTM asymmetry negatively impacts firefighter SC performance, which may be improved with appropriate exercise interventions.
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Affiliation(s)
- Nicholas A Buoncristiani
- Neuromuscular Assessment Laboratory, Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, NC
- Carolina Center for Healthy Work Design and Worker Well-Being, University of North Carolina at Chapel Hill, Chapel Hill, NC
- Human Movement Science Curriculum, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Gena R Gerstner
- Neuromuscular Assessment Laboratory, Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, NC
- Carolina Center for Healthy Work Design and Worker Well-Being, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Megan R Laffan
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | | | - Jacob A Mota
- Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX
| | - Hayden K Giuliani-Dewig
- Human Performance Innovation Center, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV
| | - Eric D Ryan
- Neuromuscular Assessment Laboratory, Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, NC
- Carolina Center for Healthy Work Design and Worker Well-Being, University of North Carolina at Chapel Hill, Chapel Hill, NC
- Human Movement Science Curriculum, University of North Carolina at Chapel Hill, Chapel Hill, NC
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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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Sammoud S, Negra Y, Bouguezzi R, Ramirez-Campillo R, Moran J, Bishop C, Chaabene H. Effects of plyometric jump training on measures of physical fitness and lower-limb asymmetries in prepubertal male soccer players: a randomized controlled trial. BMC Sports Sci Med Rehabil 2024; 16:37. [PMID: 38321538 PMCID: PMC10845392 DOI: 10.1186/s13102-024-00821-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 01/22/2024] [Indexed: 02/08/2024]
Abstract
BACKGROUND High level of physical fitness is a paramount soccer performance factor. As such, developing key components of physical fitness such as sprinting, jumping, and change of direction (CoD) at an early age empowers both short- and long-term performance success. Although previous research in prepubertal male soccer players has reported physical fitness performance enhancements following plyometric jump training (PJT), the effects on inter-limb asymmetries remain unclear. OBJECTIVE To assess the effects of PJT on measures of physical fitness and inter-limb asymmetries in prepubertal male soccer players. METHODS A total of 27 participants were recruited, and randomly assigned to either a PJT group (n = 13; age = 12.7 ± 0.2 years; maturity offset = -1.6 ± 0.7) or an active control group (CG) (n = 14; age = 11.8 ± 0.4 years; maturity offset = -2.51 ± 0.61). The training intervention lasted eight-week and was conducted during the in-season period, with twice-weekly sessions. Physical fitness tests were conducted before and after the intervention, including the 505 change-of-direction (CoD; [505 CoD test]), countermovement-jump (CMJ) height, standing-long-jump (SLJ) distance, and single-leg hop test for distance with dominant (SHTD-D) and non-dominant legs (SHTD-ND). A jump-based asymmetry score was calculated as the difference between HTD and HTND. RESULTS ANCOVA analysis revealed significant between-group differences in all physical fitness measures at post-test. Specifically, the PJT group showed significant large improvements in CMJ height, SLJ distance, HTD and HTND, and CoD speed (d = 0.84 to 2.00; ∆1.05% to 16.85%). Moreover, the PJT group showed a significant, small reduction in the inter-limb asymmetry score (d = 0.43; ∆-45.21%). In contrast, no significant changes were reported in the CG between pre-and post-tests (d = 0.07 to 0.24; ∆0.21% to 0.98%). CONCLUSIONS The incorporation of PJT into the training schedules of prepubertal male soccer players resulted in positive effects on various measures of physical fitness. Furthermore, our findings suggest that PJT can reduce lower-limb asymmetry, which could potentially decrease the risk of lower limb injuries. TRIAL REGISTRATION This study does not report results related to healthcare interventions using human participants and therefore it was not prospectively registered.
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Affiliation(s)
- Senda Sammoud
- Research Laboratory (LR23JS01) "Sport Performance, Health and Society", University "La Manouba", 2037, Manouba, Tunisia
- High Institute of Sports and Physical Education, University of Jendouba, 8189, Kef, Tunisia
| | - Yassine Negra
- Research Laboratory (LR23JS01) "Sport Performance, Health and Society", University "La Manouba", 2037, Manouba, Tunisia
- Higher Institute of Sport and Physical Education of Ksar Saïd, University "La Manouba", 2037, Manouba, Tunisia
| | - Raja Bouguezzi
- Research Laboratory (LR23JS01) "Sport Performance, Health and Society", University "La Manouba", 2037, Manouba, Tunisia
| | - Rodrigo Ramirez-Campillo
- Exercise and Rehabilitation Sciences Institute. School of Physical Therapy, Faculty of Rehabilitation Sciences, Universidad Andres Bello, 7591538, Santiago, Chile
| | - Jason Moran
- School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester, Essex, UK
| | - Chris Bishop
- Faculty of Science and Technology, London Sports Institute, StoneX Stadium, Greenlands Lane, London, UK
| | - Helmi Chaabene
- Division of Training and Movement Sciences, Research Focus Cognition Sciences, University of Potsdam, Am Neuen Palais 10, Building 12, 14469, Potsdam, Germany.
- High Institute of Sports and Physical Education, University of Jendouba, 8189, Kef, Tunisia.
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Pompa D, Carson HJ, Beato M, di Fronso S, Bertollo M. Attentional Focus Effects on Lower-Limb Muscular Strength in Athletes: A Systematic Review. J Strength Cond Res 2024; 38:419-434. [PMID: 38154026 DOI: 10.1519/jsc.0000000000004714] [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: 12/30/2023]
Abstract
ABSTRACT Pompa, D, Carson, HJ, Beato, M, di Fronso, S, and Bertollo, M. Attentional focus effects on lower-limb muscular strength in athletes: A systematic review. J Strength Cond Res 38(2): 419-434, 2024-Evidence links an athlete's focus of attention to enhancing strength performance. However, additional research is needed to investigate the applicability of studies beyond the tasks and population currently examined. Therefore, we aimed to systematically review studies concerning attentional focus effects on strength characteristics on lower-limb tasks in athletes. Scopus, Web of Science, and EBSCO databases were searched using PRISMA PERSIST guidelines and keywords related to the focus of attention, force production processes, and athletes. Subjects were categorized: world class (tier 5); elite (tier 4); highly trained (tier 3); trained/developmental (tier 2); nonathletes (tiers 1-0); and mixed (different levels). Fifteen of 296 studies met the inclusion criteria. Included studies investigated the focus of attention effects on performance ( n = 6), between skill levels ( n = 2), and for learning ( n = 5), with respect to subject preference ( n = 1); one study did not state the aim. Studies achieved an average risk of bias score of "excellent"; however, findings suffered in the assessment of certainty. Only 2 studies reported an advantage for one type of attentional focus (external focus) across conditions ( g = 0.13-0.42) with tier 2 and mixed tier athletes. Research does not address the needs of elite athletes, and there is limited evidence on each type of strength characteristics and muscle action. There is also a need to incorporate methodological steps to promote task-relevant instructions. Research should focus on contextualized information within professional practice to offer stronger translational implications for athletes and coaches.
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Affiliation(s)
- Dario Pompa
- BIND-Behavioral Imaging and Neural Dynamics Center, University "G. d'Annunzio" of Chieti-Pescara, Chieti, Italy
- Department of Medicine and Aging Sciences, University "G. d'Annunzio" of Chieti-Pescara, Chieti, Italy
| | - Howie J Carson
- Human Performance Science Research Group, Institute for Sport, Physical Education and Health Sciences, University of Edinburgh, Edinburgh, United Kingdom; and
| | - Marco Beato
- School of Health and Sports Sciences, University of Suffolk, Ipswich, United Kingdom
| | - Selenia di Fronso
- BIND-Behavioral Imaging and Neural Dynamics Center, University "G. d'Annunzio" of Chieti-Pescara, Chieti, Italy
- Department of Medicine and Aging Sciences, University "G. d'Annunzio" of Chieti-Pescara, Chieti, Italy
| | - Maurizio Bertollo
- BIND-Behavioral Imaging and Neural Dynamics Center, University "G. d'Annunzio" of Chieti-Pescara, Chieti, Italy
- Department of Medicine and Aging Sciences, University "G. d'Annunzio" of Chieti-Pescara, Chieti, Italy
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Rodriguez-Perea A, Morenas-Aguilar MD, Martinez-Garcia D, Chirosa-Rios LJ, Garcia-Buendia G. Influence of trunk rotator strength on rotational medicine ball throwing performance. J Sports Med Phys Fitness 2024; 64:30-36. [PMID: 37721721 DOI: 10.23736/s0022-4707.23.15266-2] [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: 09/19/2023]
Abstract
BACKGROUND The strength of the trunk musculature plays an essential role in performance. The aims of this study were to analyze the relationship between the strength of the trunk rotation muscles with rotational medicine ball throwing velocity and distance, to study differences between sex in rotational medicine ball throwing and to compare the asymmetries of trunk rotational strength and rotational medicine ball throwing. METHODS Thirty physically active college students participated on the study. Horizontal and low cable woodchop exercises were assessed with a functional electromechanical dynamometer and throwing was measured with a radar and a measuring tape. A Pearson's correlation coefficient was calculated for the relation between trunk rotational strength and rotational medicine ball throwing. Independent samples t-test was performed to determine the differences between sex in rotational medicine ball throwing and a paired samples t-test was performed to study the asymmetries. RESULTS Large and very large correlations were obtained between trunk rotational strength and rotational medicine ball throwing (r=0.68-0.79). Significant differences and a large effect size were found between males and females for all throwing velocity and throwing distance variables (P<0.05; ES>0.90) and asymmetries in performance of mean velocity throwing (P=0.003; ES=-0.60) and peak velocity throwing (P=0.025; ES=-0.43). No significant differences were found between dominant and non-dominant side in any of the trunk rotator strength assessment conditions (P>0.05). CONCLUSIONS There is a large or very large correlation between the STRM and the RMBT in all its modalities. Differences in strength were found between sexes, with no significant differences between dominant and non-dominant sides.
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Affiliation(s)
- Angela Rodriguez-Perea
- Department of Physical Education and Sport, Faculty of Sports Sciences, University of Granada, Granada, Spain
- CTS-642 Research Group, Department Physical Education and Sports, Strength and Conditioning Laboratory, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - María D Morenas-Aguilar
- Department of Physical Education and Sport, Faculty of Sports Sciences, University of Granada, Granada, Spain -
- CTS-642 Research Group, Department Physical Education and Sports, Strength and Conditioning Laboratory, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Darío Martinez-Garcia
- Department of Physical Education and Sport, Faculty of Sports Sciences, University of Granada, Granada, Spain
- CTS-642 Research Group, Department Physical Education and Sports, Strength and Conditioning Laboratory, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Luis J Chirosa-Rios
- Department of Physical Education and Sport, Faculty of Sports Sciences, University of Granada, Granada, Spain
- CTS-642 Research Group, Department Physical Education and Sports, Strength and Conditioning Laboratory, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Gustavo Garcia-Buendia
- Department of Physical Education and Sport, Faculty of Sports Sciences, University of Granada, Granada, Spain
- CTS-642 Research Group, Department Physical Education and Sports, Strength and Conditioning Laboratory, Faculty of Sport Sciences, University of Granada, Granada, Spain
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