Patterson R P, Moreno M I
Department of Physical Medicine and Rehabilitation, University of Minnesota, Minneapolis 55455.
Med Sci Sports Exerc. 1990 Aug;22(4):512-6.
Eleven men with recreational bicycling experience rode a bicycle ergometer with instrumented force pedals to determine the effects of pedalling rate and power output on the total resultant pedal force, Fr, and the component of the force perpendicular to the crank arm. The force patterns were obtained at power outputs of 100 W and 200 W for pedalling rates of 40-120 rpm in intervals of 10 rpm. Data were not obtained at 40 rpm at the 200 W power output. The Fr averaged over a crank cycle (Far) was lowest at 90 rpm and 100 W, a value statically different (P less than 0.05) from those at 40, 50, and 120 rpm. At 200 W, the Fr was lowest at 100 rpm, a value statistically different (P less than 0.05) from those at 50, 60, and 70 rpm. The Far varied widely (range of 30% of mean for all subjects) for individuals at a given power output. The results suggest that pedalling at 90-100 rpm may minimize peripheral forces and therefore peripheral muscle fatigue even though this rate may result in higher oxygen uptake.
11名有休闲骑行经验的男性使用装有测力踏板的自行车测力计，以确定蹬踏速率和功率输出对总合力踏板力（Fr）以及垂直于曲柄臂的力分量的影响。在功率输出为100W和200W、蹬踏速率为40 - 120转/分钟（以10转/分钟为间隔）的情况下获取力的模式。在200W功率输出时，未获取40转/分钟时的数据。在一个曲柄周期内平均的Fr（Far）在90转/分钟和100W时最低，该值与40、50和120转/分钟时的值存在统计学差异（P小于0.05）。在200W时，Fr在100转/分钟时最低，该值与50、60和70转/分钟时的值存在统计学差异（P小于0.05）。在给定功率输出时，个体的Far变化很大（所有受试者平均值的范围为30%）。结果表明，以90 - 100转/分钟的速率蹬踏可能会使外周力最小化，从而使外周肌肉疲劳最小化，尽管这个速率可能会导致更高的摄氧量。
