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Möck S, Wirth K. Bilateral differences of isokinetic knee extensor strength are velocity- and task-dependent. Sports Biomech 2024:1-13. [PMID: 38329274 DOI: 10.1080/14763141.2024.2315260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 01/31/2024] [Indexed: 02/09/2024]
Abstract
The purpose of this study was to investigate the concordance of isokinetic bilateral strength differences of the knee extensors in single- and multi-joint movement tasks. One hundred and nineteen male athletes performed isokinetic legpresses at 0.1 m/s and 0.7 m/s as well as isokinetic knee extensions at 60°/s and 180°/s. Bilateral differences and directed bilateral differences (sign indicating the direction of the difference) were calculated for all measurements. Bland-Altman-Plots were plotted to investigate if the different conditions detect bilateral differences of the same magnitude. Additionally, concordance correlations for the directed bilateral differences of the different tests were calculated to investigate magnitude and direction. The results indicate poor to fair concordance between the bilateral differences in the legpress conditions as well as between single- and multi-joint tasks. The single-joint knee extensions displayed a moderate level of agreement. Bilateral strength differences in isokinetic movement tasks are dependent on movement velocity and the nature of the task (single- or multi-joint movement) in the lower extremities. Both the value and the direction of the strength differences show no clear pattern across the investigated measurements and cannot be used interchangeably. Therefore, to assess interlimb strength balance, multiple different tests should be performed.
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Affiliation(s)
- Sebastian Möck
- Department of Exercise Science, Olympic Training and Testing Center of Hessen, Frankfurt am Main, Germany
| | - Klaus Wirth
- Sport and Exercise Sciences, University of Applied Sciences Wiener Neustadt, Wiener Neustadt, Austria
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Hammami N, Frih B, Rahali H, Mkacher W, Rezgui T, Čular D, Bouassida A. Effects of taekwondo style practice on cardiac remodeling and isokinetic thigh strength in elite women players. Sci Sports 2021. [DOI: 10.1016/j.scispo.2020.10.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yu Y, Yan H. COMPARATIVE ANALYSIS OF KNEE MUSCLE DAMAGE OF DIFFERENT ATHLETES. REV BRAS MED ESPORTE 2021. [DOI: 10.1590/1517-8692202127072021_0369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Introduction: The knee joint is the most complex weight-bearing joint in the human body. An athlete's knee joint is prone to injury in competitive sports; it is one of the most common injuries and, in some sports, severe meniscus and cruciate ligament injuries occur frequently as, for example, in handball and soccer, and can even end the career of an elite athlete. Objective: To explore the comparison of knee flexion and extension force injury in different athletes. Methods: The characteristics of the flexor and extensor muscle of the knee joint in handball, football and cycling were studied with the isokinetic technique. Results: The role of the knee joint in different types of sports played by athletes is obviously different, which leads to the different requirements of the flexor and extensor muscle in the knee joint. Conclusions: The key to improving the conditions of superior strength and preventing sports injury is to develop the features of specific strength reasonably. Level of evidence II; Therapeutic studies - investigation of treatment results.
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Lower-Limb Muscle Strength, Anterior-Posterior and Inter-Limb Asymmetry in Professional, Elite Academy and Amateur Soccer Players. J Hum Kinet 2021; 77:135-146. [PMID: 34168699 PMCID: PMC8008310 DOI: 10.2478/hukin-2020-0058] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Given the importance of the lower-limb strength and strength balance in soccer players and its relationship with injury prevention and performance, the present study compared quadriceps and hamstrings strength, the conventional (Hconc:Qconc), functional (Hecc:Qconc) hamstrings-to-quadriceps ratio and inter-limb strength asymmetry in professional, elite academy and amateur male soccer players. In this cross-sectional study, two hundred-six soccer players (professional = 75, elite academy = 68, amateurs = 63) volunteered to participate. Quadriceps and hamstrings isokinetic peak torque was investigated at 60° .s-1 in both the concentric and eccentric modality and at 300°.s-1 in the concentric modality. The conventional Hconc:Qconc, functional Hecc:Qconc ratio and quadriceps and hamstrings inter-limb strength asymmetry were then calculated. Professional players presented greater quadriceps and hamstrings strength than elite academy (effect size from small to moderate) and amateur players (moderate to very large). Both the conventional Hconc:Qconc and functional Hecc:Qconc ratio were greater in professional than elite academy and amateur players (small to moderate). Overall, quadriceps and hamstrings inter-limb strength asymmetry was greater in amateurs than professional (small to very large) and elite academy (trivial to large) players. The present findings provide coaches and medical staffs with normative lower-limb muscle strength data on professional, academy and amateur soccer players. Overall lower-limb muscle strength and inter-limb strength asymmetry could be used to evaluate possible inference on injury prevention and performance. The hamstrings-to-quadriceps ratio poorly differentiates between the soccer players background and offers limited prediction for injury prevention and performance.
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Daniels KAJ, King E, Richter C, Falvey É, Franklyn-Miller A. Changes in the kinetics and kinematics of a reactive cut maneuver after successful athletic groin pain rehabilitation. Scand J Med Sci Sports 2020; 31:839-847. [PMID: 33098142 DOI: 10.1111/sms.13860] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 09/19/2020] [Accepted: 10/16/2020] [Indexed: 11/30/2022]
Abstract
Athletic groin pain (AGP) is a chronic, painful condition which is prevalent in players of field sports that require rapid changes of direction. Following successful rehabilitation, systematic changes have been observed in the kinetics and kinematics of pre-planned change of direction maneuvers, providing insight into potential foci for rehabilitation monitoring and for the assessment of interventions. However, changing direction in field sports is often reactive rather than pre-planned, and it is not known whether such post-rehabilitation changes are seen in reactive maneuvers. We analyzed the stance phase kinetics and kinematics of a 90° reactive cutting maneuver in 35 AGP patients before and after a successful exercise intervention program. Following the intervention, transverse plane rotation of the pelvis toward the intended direction of travel increased, and the body center of mass was positioned more anteriorly relative to the center of pressure. Ankle dorsiflexion also increased, and participants demonstrated greater ankle plantar flexor internal moment and power during the second half of stance. These findings provide insight into mechanical variables of potential importance in AGP, as identified during a maneuver based on a common sporting task.
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Affiliation(s)
- Katherine A J Daniels
- Sports Medicine Research Department, Sports Surgery Clinic, Dublin, Ireland.,Queen's School of Engineering, University of Bristol, Bristol, UK.,Department of Sport and Exercise Sciences, Manchester Metropolitan University, Manchester, UK
| | - Enda King
- Sports Medicine Research Department, Sports Surgery Clinic, Dublin, Ireland.,Department of Life Sciences, University of Roehampton, London, UK
| | - Chris Richter
- Sports Medicine Research Department, Sports Surgery Clinic, Dublin, Ireland.,Department of Life Sciences, University of Roehampton, London, UK
| | - Éanna Falvey
- Sports Medicine Research Department, Sports Surgery Clinic, Dublin, Ireland.,Department of Medicine, University College Cork, Cork, Ireland
| | - Andy Franklyn-Miller
- Sports Medicine Research Department, Sports Surgery Clinic, Dublin, Ireland.,Centre for Health, Exercise and Sports Medicine, University of Melbourne, Melbourne, Australia
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Ko KJ, Ha GC, Kim DW, Kang SJ. Effects of lower extremity injuries on aerobic exercise capacity, anaerobic power, and knee isokinetic muscular function in high school soccer players. J Phys Ther Sci 2017; 29:1715-1719. [PMID: 29184275 PMCID: PMC5683996 DOI: 10.1589/jpts.29.1715] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 06/26/2017] [Indexed: 11/24/2022] Open
Abstract
[Purpose] The study investigated the effects of lower extremity injuries on aerobic
exercise capacity, anaerobic power, and knee isokinetic muscular function in high school
soccer players. [Subjects and Methods] The study assessed U High School soccer players
(n=40) in S area, South Korea, divided into 2 groups: a lower extremity injury group
(n=16) comprising those with knee and ankle injuries and a control group (n=24) without
injury. Aerobic exercise capacity, anaerobic power, and knee isokinetic muscular function
were compared and analyzed. [Results] Regarding the aerobic exercise capacity test,
significant differences were observed in maximal oxygen uptake and anaerobic threshold
between both groups. For the anaerobic power test, no significant difference was observed
in peak power and average power between the groups; however, a significant difference in
fatigue index was noted. Regarding the knee isokinetic muscular test, no significant
difference was noted in knee flexion, extension, and flexion/extension ratio between both
groups. [Conclusion] Lower extremity injury was associated with reduced aerobic exercise
capacity and a higher fatigue index with respect to anaerobic exercise capacity.
Therefore, it seems necessary to establish post-injury training programs that improve
aerobic and anaerobic exercise capacity for soccer players who experience lower extremity
injury.
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Affiliation(s)
- Kwang-Jun Ko
- Department of Sports Medicine, National Health Fitness Center, Republic of Korea
| | - Gi-Chul Ha
- Department of Sports Medicine, National Health Fitness Center, Republic of Korea
| | - Dong-Woo Kim
- Department of Sports Medicine, SPOSA, Republic of Korea
| | - Seol-Jung Kang
- Department of Physical Education, Changwon National University: 20 Changwondaehak-ro, Uichang-gu, Changwon-si, Gyeongsangnam-do, Republic of Korea
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