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KMID : 1035420220100020115
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Journal of The Korean Society of Integrative Medicine
2022 Volume.10 No. 2 p.115 ~ p.123
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Effects of the Active Static Stretching and Eccentric Exercise of Hamstring Muscles on Flexibility, Strength, and Agility Performance
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Kang Ji-Hun
Kang Eun-Hyo
Jeon Jeong-Woo
Hong Ji-Hoen
Yu Jae-Ho
Kim Jin-Seop
Kim Seong-Gil
Lee Dong-Yeop
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Abstract
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Purpose : The hamstring is a group of three muscles, biceps femoris, semitendinosus, and semimembranosus, placed behind the thigh. The hamstring is one of the most commonly injured muscles and usually occurs during high-speed, high-intensity exercise. The purpose of this study was to investigate the effect of static stretching and eccentric exercise of hamstrings on flexibility, strength, and functional performance.
Methods : This study was conducted on 28 healthy adults. Subjects were divided into a static stretching group (n=15) and an eccentric exercise group (n=13). Subjects measured hamstring flexibility (active knee extension test), hamstring strength (concentric and eccentric peak torque), and functional performance (triple hop for distance and modified 20 m sprint). The intervention was conducted three times a week for six weeks. To compare the difference between values before and after the intervention, paired t-test was used, and an independent t-test was used to compare between groups.
Results : In both groups, the active knee extension test, concentric peak torque, triple hop test, and 20 m sprint significantly increased after the intervention compared to before the intervention (p<.05). However, no significant difference was found in eccentric peak torque after intervention in both groups (p>.05). No significant difference was found between the two groups in the effect on the variables (p>.05).
Conclusion : Both interventions were found to be effective for flexibility, concentric strength, and functional performance. Eccentric exercise and static stretching are recommended to improve the flexibility and functional performance of the hamstring. This study's results will be considered essential data on the effectiveness of static stretching and eccentric exercise.
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KEYWORD
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eccentric exercise, flexibility, hamstring, static stretching, strength
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