Nguyen Diamond, Brown Lee E, Coburn Jared W, Judelson Daniel A, Eurich Alea D, Khamoui Andy V, Uribe Brandon P
Human Performance Laboratory, Department of Kinesiology at California State University, Fullerton, California, USA.
J Strength Cond Res. 2009 Jul;23(4):1282-6. doi: 10.1519/JSC.0b013e3181970017.
Eccentric muscle actions cause muscle damage and lead to delayed-onset muscle soreness (DOMS), which may impair performance. The purpose of this study was to examine the effect of DOMS on elbow flexion strength and rate of velocity development (RVD). Nineteen college male subjects performed 6 tests (pre- and posteccentric and every 24 hours for 4 days). In the preeccentric tests, each subject reported his arm pain and then did 5 concentric repetitions of elbow flexion/extension on an isokinetic dynamometer at 240 degrees x s(-1). Each subject then completed 6 sets of 10 eccentric elbow flexion actions at 30 degrees x s(-1) and finished with a posteccentric test with another 5 concentric repetitions at 240 degrees x s(-1). On days 1-4, each subject reported his arm pain and then did 5 more repetitions at 240 degrees x s(-1). Analysis was performed on the values for DOMS, peak torque (PT), and RVD. For DOMS, scores on the posteccentric test (2.34 +/- 2.53), day 1 (3.18 +/- 2.18), day 2 (3.21 +/- 2.91), day 3 (1.81 +/- 1.78), and day 4 (1.02 +/- 1.30) were all significantly (p < 0.05) greater than the preeccentric scores (0.00 +/- 0.00). For PT, the scores on the posteccentric test (22.40 +/- 8.87 ft x lb(-1)) and day 1 (23.88 +/- 9.00 ft x lb(-1)) were both significantly less than on the preeccentric test (29.56 +/- 8.42 ft x lb(-1)). The RVD scores on the posteccentric test (1505.73 +/- 462.12 d x s(-1) x s(-1)), day 1 (1571.55 +/- 475.99 d x s(-1) x s(-1)), and day 2 (1546.99 +/- 494.52 d x s(-1) x s(-1)) were all significantly less than on the preeccentric test (1719.86 +/- 473.18 d x s(-1) x s(-1)). This suggests that muscle damage may cause significant decreases in elbow flexion concentric strength and RVD even as DOMS remains elevated.
离心性肌肉动作会导致肌肉损伤并引发延迟性肌肉酸痛（DOMS），这可能会损害运动表现。本研究的目的是检验DOMS对肘部屈曲力量和速度发展率（RVD）的影响。19名大学男性受试者进行了6次测试（离心前、离心后以及之后4天内每隔24小时进行一次）。在离心前测试中，每位受试者报告其手臂疼痛情况，然后在等速测力计上以240度/秒的速度进行5次肘部屈伸的向心性重复动作。之后，每位受试者以30度/秒的速度完成6组每组10次的肘部离心屈曲动作，并在最后进行一次离心后测试，同样以240度/秒的速度进行5次向心性重复动作。在第1至4天，每位受试者报告其手臂疼痛情况，然后再次以240度/秒的速度进行5次重复动作。对DOMS、峰值扭矩（PT）和RVD的值进行了分析。对于DOMS，离心后测试的得分（2.34±2.53）、第1天（3.18±2.18）、第2天（3.21±2.91）、第3天（1.81±1.78）和第4天（1.02±1.30）均显著（p<0.05）高于离心前测试的得分（0.00±0.00）。对于PT，离心后测试的得分（22.40±8.87英尺·磅⁻¹）和第1天（23.88±9.00英尺·磅⁻¹）均显著低于离心前测试的得分（29.56±8.42英尺·磅⁻¹）。离心后测试的RVD得分（1505.73±462.12度/秒²）、第1天（1571.55±475.99度/秒²）和第2天（1546.99±494.52度/秒²）均显著低于离心前测试的得分（1719.86±473.18度/秒²）。这表明即使DOMS仍然较高，肌肉损伤可能会导致肘部屈曲向心力量和RVD显著下降。
