Garcin M, Vautier J F, Vandewalle H, Monod H
Laboratoire de Physiologie du Travail et du Sport, La Pitié Salpêtrière, Paris, France.
Ergonomics. 1998 Aug;41(8):1105-14. doi: 10.1080/001401398186414.
The main purpose of this study was to assess the correlations of RPE with indicators of endurance (critical power), exhaustion time and the electromyographic activity of a relevant muscle during general and local exercises. Eight healthy subjects participated in the study. During the first session, Maximal Aerobic Power (MAP) was measured by means of an incremental cycling exercise on a Monark ergometer. At 1-week intervals the participants performed a general or local exhausting exercise, which consisted of a cycle exercise (60, 73, 86 or 100% MAP) and a knee extension exercise (lifting a load between 17.5 and 32.5 kg every 3 s), respectively. The critical powers corresponding to cycling (CPcycling) and knee extension (CPknee) were calculated from the slope of the linear relationship between exhaustion time (tlim) and work. Rate of perceived exertion, concerning the whole body (overall RPE [RPEov]), RPE concerning the exercising muscles (muscular RPE [RPEmu]) and exhaustion time were measured. During the last session, the integrated electromyogram of the right Vastus Lateralis (iEMG s-1) was measured during short (20 s) cycling and knee extension non-exhausting exercises, with the same electrode location, at the different power outputs used during the exhausting exercises. The relationships between RPEmu at the fifth minute and log tlim and between iEMG% (percentage of the iEMG s-1 corresponding to 100% MAP during cycling) and log tlim were similar for the cycling and knee extension exercises. The mean values of RPEmu at the fifth minute of exercise calculated for CPcycling and CPknee were almost equal (12.3 +/- 1.7 versus 12.2 +/- 0.9). Similarly, the mean values of iEMG% corresponding to CPcycling and CPknee were equal (78.44 versus 79.02%). These results suggest that RPEmu is related to aerobic endurance and that the possibility of sustaining a high percentage of maximal aerobic power during a general exercise is mainly related to local muscular factors.
本研究的主要目的是评估主观用力程度（RPE）与耐力指标（临界功率）、疲劳时间以及全身和局部运动期间相关肌肉的肌电图活动之间的相关性。八名健康受试者参与了该研究。在第一次测试中，通过在Monark测力计上进行递增式自行车运动来测量最大有氧功率（MAP）。每隔1周，参与者分别进行一次全身或局部的疲劳运动，全身疲劳运动为自行车运动（60%、73%、86%或100% MAP），局部疲劳运动为膝关节伸展运动（每3秒举起17.5至32.5千克的负荷）。根据疲劳时间（tlim）与功之间的线性关系斜率，计算出与自行车运动（CPcycling）和膝关节伸展运动（CPknee）相对应的临界功率。测量了关于全身的主观用力程度（总体RPE [RPEov]）、关于运动肌肉的主观用力程度（肌肉RPE [RPEmu]）和疲劳时间。在最后一次测试中，在短时间（20秒）的自行车运动和膝关节伸展非疲劳运动期间，使用与疲劳运动中相同的电极位置，在不同功率输出下测量右侧股外侧肌的积分肌电图（iEMG s-1）。自行车运动和膝关节伸展运动中，运动第5分钟时的RPEmu与log tlim之间以及iEMG%（自行车运动中对应100% MAP的iEMG s-1百分比）与log tlim之间的关系相似。针对CPcycling和CPknee计算出的运动第5分钟时RPEmu的平均值几乎相等（12.3±1.7对12.2±0.9）。同样，对应于CPcycling和CPknee的iEMG%平均值相等（78.44对79.02%）。这些结果表明，RPEmu与有氧耐力相关，并且在全身运动期间维持高百分比最大有氧功率的可能性主要与局部肌肉因素有关。
