Delahunt Eamonn, McGroarty Mark, De Vito Giuseppe, Ditroilo Massimiliano
School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Republic of Ireland.
Institute for Sport and Health, University College Dublin, Dublin, Republic of Ireland.
Eur J Appl Physiol. 2016 Apr;116(4):663-72. doi: 10.1007/s00421-015-3325-3. Epub 2016 Jan 11.
To investigate the kinematic and muscle activation adaptations during performance of the Nordic hamstring exercise (NHE) to a 6-week eccentric hamstring training programme using the NHE as the sole mode of exercise.
Twenty-nine healthy males were randomly allocated to a control (CG) or intervention (IG) group. The IG participated in a 6-week eccentric hamstring exercise programme using the NHE.
The findings of the present study were that a 6-week eccentric hamstring training programme improved eccentric hamstring muscle strength (202.4 vs. 177.4 nm, p = 0.0002, Cohen's d = 0.97) and optimized kinematic (longer control of the forward fall component of the NHE, 68.1° vs. 73.7°, p = 0.022, Cohen's d = 0.90) and neuromuscular parameters (increased electromyographic activity of the hamstrings, 83.2 vs. 56.6 % and 92.0 vs. 54.2 %, p < 0.05, Cohen's d > 1.25) associated with NHE performance.
This study provides some insight into potential mechanisms by which an eccentric hamstring exercise programme utilizing the NHE as the mode of exercise may result in an improvement in hamstring muscle control during eccentric contractions.
研究在将北欧腿弯举练习（NHE）作为唯一运动方式的为期6周的离心性腿弯举训练计划中，进行NHE时的运动学和肌肉激活适应性变化。
29名健康男性被随机分配到对照组（CG）或干预组（IG）。干预组参与了一项为期6周的使用NHE的离心性腿弯举训练计划。
本研究的结果是，为期6周的离心性腿弯举训练计划提高了离心性腿弯举肌肉力量（202.4对177.4牛米，p = 0.0002，科恩d值 = 0.97），并优化了与NHE表现相关的运动学参数（对NHE向前跌倒部分的控制时间更长，68.1°对73.7°，p = 0.022，科恩d值 = 0.90）和神经肌肉参数（腿弯举肌的肌电图活动增加，83.2%对56.6%以及92.0%对54.2%，p < 0.05，科恩d值 > 1.25）。
本研究为以NHE为运动方式的离心性腿弯举训练计划可能导致离心收缩期间腿弯举肌控制改善的潜在机制提供了一些见解。
