Department of Health, Exercise Science, and Recreation Management, University of Mississippi, Oxford, MS
Clin J Pain. 2013 May;29(5):443-9. doi: 10.1097/AJP.0b013e318262ddfe.
This study examined the effects of exercise-induced muscle damage (EIMD) on the physiological and perceptual responses to 30 minutes of submaximal cycling at 60% of oxygen consumption (VO2 peak).
Ten participants completed two 30-minute bouts of cycling, one before and one 48 hours after performance of strenuous (24 contractions with 120% of concentric 1-repeition maximum) eccentric exercise.
Eccentric exercise resulted in a significant delayed-onset muscle pain (1.6±1.6 mm to 44.8±20 mm on a 100-mm visual analog scale; P<0.001) and a 15% (P<0.001) reduction in maximal strength 48 hours after exercise. Ratings of quadriceps muscle pain (1.99±0.42 vs. 3.30±0.56; P=0.003) and perceived exertion (RPE; 13.0±0.30 vs. 13.8±0.61; P=0.02) were elevated during cycling after EIMD at identical work rates. No changes were observed in VO2 (29.6±4.6 vs. 30.2±4.4 mL/kg/min; P=0.41), heart rate (154±15 vs. 155±9 beats/min; P=0.58), and ventilation (57.2±12.1 vs. 59.8±12.7 L/min; P=0.13) during exercise after EIMD. The mean change in RPE was significantly correlated (r=0.56; P<0.01) with the change in muscle pain during cycling and delayed-onset pain during resistance exercise (r=0.86; P<0.01), but did not correlate with changes in VO2, heart rate, ventilation, and maximal strength.
These findings indicate the elevations in RPE after EIMD are likely a consequence of the EIMD with the most likely explanation being an increase in localized pain before and during cycling exercise.
本研究旨在探讨运动诱导的肌肉损伤（EIMD）对 60%最大摄氧量（VO2 峰值）下 30 分钟亚极量骑行的生理和感知反应的影响。
10 名参与者完成了两次 30 分钟的骑行，一次是在剧烈运动（24 次收缩，120%的同心 1 重复最大值）离心运动前，一次是在运动后 48 小时。
离心运动导致延迟发作的肌肉疼痛（100mm 视觉模拟量表上的 1.6±1.6mm 至 44.8±20mm；P<0.001）和最大力量下降 15%（P<0.001），运动后 48 小时。股四头肌疼痛评分（1.99±0.42 与 3.30±0.56；P=0.003）和感知用力（RPE；13.0±0.30 与 13.8±0.61；P=0.02）在 EIMD 后以相同的工作速率进行骑行时升高。在 EIMD 后运动期间，VO2（29.6±4.6 与 30.2±4.4mL/kg/min；P=0.41）、心率（154±15 与 155±9 次/分钟；P=0.58）和通气（57.2±12.1 与 59.8±12.7L/min；P=0.13）均无变化。RPE 的平均变化与骑行期间肌肉疼痛的变化和抗阻运动时延迟发作疼痛的变化显著相关（r=0.56；P<0.01）（r=0.86；P<0.01），但与 VO2、心率、通气和最大力量的变化无关。
这些发现表明，EIMD 后 RPE 的升高很可能是 EIMD 的结果，最有可能的解释是在骑行前和骑行期间局部疼痛增加。
