1. The Effect of the Nordic Hamstring Exercise on Muscle Activity: A Multichannel Electromyography Randomized Controlled Trial.
- Author
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Suskens, Jozef J.M., Maas, Huub, van Dieën, Jaap H., Kerkhoffs, Gino M.M.J., Goedhart, Edwin A., Tol, Johannes L., and Reurink, Gustaaf
- Subjects
HAMSTRING muscle physiology ,STATISTICS ,MUSCLE contraction ,CONFIDENCE intervals ,EXERCISE physiology ,RANDOMIZED controlled trials ,T-test (Statistics) ,DESCRIPTIVE statistics ,ELECTROMYOGRAPHY ,STATISTICAL sampling ,DATA analysis ,DATA analysis software ,EXERCISE therapy - Abstract
The aim of this study was to evaluate the effect of a Nordic hamstring exercise intervention on biceps femoris long head, semitendinosus, and semimembranosus muscle's activity and relative contributions through multichannel electromyography. Twenty-four injury-free male basketball players (mean age 20 [3] y) were randomly assigned to a 12-week intervention (n = 13) or control group (n = 11). The primary outcome measures were normalized muscle activity (percentage of maximal voluntary isometric contraction, %MVIC) and relative contribution of hamstring muscles over 12 weeks. No effects were found on any of the primary outcome measures. Between-group differences over 12 weeks were 2.7%MVIC (95% confidence interval 95% CI, −0.7 to 6.1) for the biceps femoris long head, 3.4%MVIC (95% CI, −1.4 to 8.2) for the semitendinosus, and 0.8%MVIC (95% CI, −3.0 to 4.6) for the semimembranosus, P =.366. Between-group differences over 12 weeks were 1.0% relative contribution (%con; 95% CI, −3.0 to 5.1) for the biceps femoris long head, 2.2% relative contribution (95% CI, −2.8 to 7.2) for the semitendinosus, and −3.3% relative contribution (95% CI, −6.4 to −0.1) for the semimembranosus P =.258. A positive value implies a higher value for the Nordic group. A Nordic hamstring exercise intervention did not affect the level of muscle activity and relative contribution of hamstring muscles in performance of the Nordic hamstring exercise. [ABSTRACT FROM AUTHOR] more...
- Published
- 2023
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