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首页> 外文期刊>International journal of sports medicine >Shift of peak torque angle after eccentric exercise.
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Shift of peak torque angle after eccentric exercise.

机译：偏心运动后峰值扭矩角的变化。

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摘要

This study aims to investigate the changes in the mechanical properties of quadriceps muscle following a sub-maximal concentric-eccentric stepping exercise protocol. Twenty-four untrained healthy subjects aged 21.9 +/- 0.55 years were asked to perform a 10-minute stepping exercise where the dominant leg worked eccentrically and the non-dominant leg worked concentrically at a rate of 15 cycles/min. The quadriceps isokinetic peak torque and the corresponding peak torque angle at angular velocity of 60 degrees /sec, and muscle soreness were determined at baseline, immediately after, day 1 and day 2 after the exercise protocol. Repeated measures of ANOVA showed no change in the peak torque after the eccentric exercise and concentric exercise (p > 0.05). There was a significant shift in the peak torque angle to longer muscle lengths in the eccentrically-exercised leg immediately (65.6 +/- 2.21 degrees ) and on the following two days after exercise (day 1: 68.3 +/- 2.71 degrees ; day 2: 67.4 +/- 2.51 degrees) when compared with baseline (61.4 +/- 1.55 degrees , p < 0.05). These features were not observed in the concentrically-exercised leg. Eccentric exercise produced a higher level of soreness than concentric exercise at day 1 and 2 after the protocol. Submaximal eccentric exercise could bring about changes in the muscle properties resulting in a shift in the angle-torque relationship to longer muscle length without significant force deficit.
机译：这项研究的目的是研究亚最大同心-偏心步进锻炼方案后股四头肌肌肉力学性能的变化。 24名21.9 +/- 0.55岁的未经训练的健康受试者被要求进行10分钟的踩踏运动，其中优势腿偏心地工作，而非优势腿同心地以15个周期/分钟的速度工作。在运动方案后第1天和第2天立即在基线确定四头肌等速运动峰值扭矩和相应的峰值扭矩角（角速度为60度/秒）以及肌肉酸痛。重复测量的方差分析表明，离心运动和同心运动后峰值扭矩没有变化（p> 0.05）。即刻（65.6 +/- 2.21度）和运动后的第二天（第1天：68.3 +/- 2.71度;第2天），峰值扭矩角向较长的腿部肌肉长度有明显变化。 ：与基线（61.4 +/- 1.55度，p <0.05）相比时为67.4 +/- 2.51度。在同心运动腿中未观察到这些特征。在试验后第1天和第2天，离心运动比同心运动产生的酸痛程度更高。次最大的离心运动可能会导致肌肉特性发生变化，从而导致角度-扭矩关系转变为更长的肌肉长度，而没有明显的力量不足。

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