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Torque-angle curve of the knee flexors in athletes with a prior history of hamstring strain

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Title: Torque-angle curve of the knee flexors in athletes with a prior history of hamstring strain
Authors: Mikami, Kentaro Browse this author
Samukawa, Mina Browse this author →KAKEN DB
Oba, Kensuke Browse this author
Nakamura, Kentaro Browse this author
Suzumori, Yuki Browse this author
Ishida, Yuko Browse this author
Matsumoto, Hisashi Browse this author
Aoki, Yoshimitsu Browse this author
Ishida, Tomoya Browse this author
Yamanaka, Masanori Browse this author →KAKEN DB
Tohyama, Harukazu Browse this author →KAKEN DB
Keywords: hamstring injury
eccentric muscle action
high angular velocity
Issue Date: Mar-2022
Publisher: Elsevier
Journal Title: Physical Therapy in Sport
Volume: 54
Start Page: 29
End Page: 35
Publisher DOI: 10.1016/j.ptsp.2021.11.008
PMID: 34929533
Abstract: Objectives: To investigate the knee flexor torque-angle curve after hamstring strain injury using different muscle action types and angular velocities. Design: Cross-sectional. Setting: Controlled laboratory. Participants: Thirteen collegiate athletes injured hamstring strain (21.0 +/- 0.8 years; 173.9 +/- 6.5 cm; 70.1 +/- 10.5 kg). Main outcome measures: Concentric and eccentric knee flexor torque was measured at 60 & 300 degrees/sec. Peak torque and average torque every 10 degrees were determined from torque-angle curve and injured side was compared with non-injured side. Results: No significant differences were found in the concentric muscle actions. However, the eccentric peak torque was significantly lower on the injured side at 60 degrees/sec (p = 0.048) and at 300 degrees/sec (p = 0.002). The average eccentric torque was significantly lower on the injured side at 60 degrees/sec from 10 degrees to 20 degrees of knee flexion (p = 0.012-0.018) and at 300 degrees/sec from 10 degrees to 60 degrees of knee flexion (p = 0.005-0.049). Conclusion: The knee flexor torque-angle curve changes with eccentric muscle action after hamstring injury. Eccentric torque declines were close to full knee extension at 60 degrees/sec and a wide range of knee flexion at 300 degrees/sec. The assessment and rehabilitation of eccentric hamstring strength may be important to consider the effect of the angular velocity after hamstring strain injury. (C) 2021 Elsevier Ltd. All rights reserved.
Rights: © 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:保健科学院・保健科学研究院 (Graduate School of Health Sciences / Faculty of Health Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 寒川 美奈

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