Coast J R, Welch H G
Eur J Appl Physiol Occup Physiol. 1985;53(4):339-42. doi: 10.1007/BF00422850.
This experiment was designed to estimate the optimum pedal rates at various power outputs on the cycle ergometer. Five trained bicycle racers performed five progressive maximal tests on the ergometer. Each rode at pedal rates of 40, 60, 80, 100, and 120 rev X min-1. Oxygen uptake and heart rate were determined from each test and plotted against pedal rate for power outputs of 100, 150, 200, 250, and 300 W. Both VO2 and heart rate differed significantly among pedal rates at equivalent power outputs, the variation following a parabolic curve. The low point in the curve was taken as the optimal pedal rate; i.e., the pedal rate which elicited the lowest heart rate or VO2 for a given power output. When the optimum was plotted against power output the variation was linear. These results indicate that an optimum pedal rate exists in this group of cyclists. This optimum pedal rate increases with power output, and when our study is compared to studies in which elite racers, or non-racers were used, the optimum seems to increase with the skill of the rider.
本实验旨在评估在不同功率输出下，自行车测力计上的最佳蹬踏频率。五名训练有素的自行车赛车手在测力计上进行了五次递增式最大测试。每人分别以每分钟40、60、80、100和120转的蹬踏频率骑行。每次测试均测定摄氧量和心率，并针对100、150、200、250和300瓦的功率输出，将其与蹬踏频率作图。在同等功率输出下，不同蹬踏频率的摄氧量和心率均存在显著差异，变化呈抛物线状。曲线的最低点被视为最佳蹬踏频率，即在给定功率输出下，能引发最低心率或摄氧量的蹬踏频率。当将最佳频率与功率输出作图时，变化呈线性。这些结果表明，在这组自行车骑行者中存在一个最佳蹬踏频率。该最佳蹬踏频率随功率输出增加而升高，并且当将我们的研究与使用精英赛车手或非赛车手的研究相比较时，最佳频率似乎随骑行者的技能水平提高而增加。
