McCartney N, Heigenhauser G J, Sargeant A J, Jones N L
J Appl Physiol Respir Environ Exerc Physiol. 1983 Jul;55(1 Pt 1):212-7. doi: 10.1152/jappl.1983.55.1.212.
A cycle ergometer has been designed to measure the force exerted on the pedal cranks during maximum effort at a variety of constant velocities. Preset crank velocities of 13-166 rpm are established by a controlled 3-hp motor and cannot be overcome by the subject. Torque is measured by strain gauges bonded to the crank shafts; peak torque, peak power, work, and average power are derived for each pedal cycle. Studies in 30 healthy male subjects established reproducibility and normal standards. During exercise for 45 s at a constant velocity of 60 rpm, there was a wide intersubject variation in both maximal torque (118-226 N . m) and the percentage decline in torque (27.2-52.0%). The decline in torque was inversely related to maximal O2 intake (r = 0.84). During short (10-s) periods of exercise at six crank velocities between 60-160 rpm, a linear inverse relationship between maximal peak torque and pedal crank velocity was observed. The peak torque-velocity relationship and the percentage decline in peak torque during 30 s exercise at 60, 100, and 140 rpm were reproducible within a given subject, the coefficient of variation was less than 10%.
一种自行车测力计已被设计出来，用于测量在各种恒定速度下全力运动时施加在踏板曲柄上的力。预设的曲柄速度为13 - 166转/分钟，由一台3马力的受控电机设定，受试者无法超越。扭矩通过粘贴在曲轴上的应变片进行测量；每个踏板周期可得出峰值扭矩、峰值功率、功和平均功率。对30名健康男性受试者的研究确定了其可重复性和正常标准。在以60转/分钟的恒定速度运动45秒期间，最大扭矩（118 - 226牛·米）和扭矩下降百分比（27.2 - 52.0%）在受试者之间存在很大差异。扭矩下降与最大摄氧量呈负相关（r = 0.84）。在60 - 160转/分钟的六个曲柄速度下进行短时间（10秒）运动期间，观察到最大峰值扭矩与踏板曲柄速度之间呈线性负相关。在给定受试者中，60、100和140转/分钟下30秒运动期间的峰值扭矩 - 速度关系以及峰值扭矩下降百分比具有可重复性，变异系数小于10%。
