open access

https://hdl.handle.net/2115/88171

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

英語

dynamometer

2022-03

Elsevier

Physical Therapy in Sport

54

29-35

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.

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© 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/

1466-853X