Centre for Sports and Exercise Science, School of Biological Sciences, University of Essex, Colchester, UK.
J Sport Exerc Psychol. 2012 Aug;34(4):444-56. doi: 10.1123/jsep.34.4.444.
Optic flow on the retina creates a perception of a person's movement relative to their surroundings. This study investigated the effect of optic flow on perceived exertion during cycling. Fifteen participants completed a 20-km reference cycling time trail in the fastest possible time followed by three randomly counterbalanced 20-km cycling trials. Optic flow, via projected video footage of a cycling course, either represented actual speed (TTNORM) or was varied by -15% (TTSLOW) and +15% (TTFAST). During TTSLOW, power output and ratings of perceived exertion (RPE), measured every 4 km, were lower during TTSLOW compared with TTNORM and TTFAST. There were no differences in heart rate or cadence. This study is the first to show that different rates of optic flow influence perceived exertion during cycling, with slower optic flow being associated with lower RPE and higher power output.
视网膜上的光流会产生人相对于周围环境运动的感知。本研究调查了光流对骑自行车时感知用力的影响。15 名参与者以最快的速度完成了 20 公里的参考自行车计时赛，随后进行了三次随机平衡的 20 公里自行车试验。通过投影的自行车课程视频片段，光流要么代表实际速度（TTNORM），要么变化 15%（TTSLOW）和 15%（TTFAST）。在 TTSLOW 期间，与 TTNORM 和 TTFAST 相比，TTSLOW 期间的功率输出和感知用力等级（RPE）（每 4 公里测量一次）较低。心率和踏频没有差异。这项研究首次表明，不同的光流速率会影响骑自行车时的感知用力，较慢的光流与较低的 RPE 和较高的功率输出相关。
