Yoshihuku Y, Herzog W
University of Calgary, Biomechanics Laboratory, Faculty of Physical Education, Alberta, Canada.
J Biomech. 1990;23(10):1069-79. doi: 10.1016/0021-9290(90)90322-t.
The purpose of this study was to find the optimal values of design parameters for a bicycle-rider system (crank length, pelvic inclination, seat height, and rate of crank rotation) which maximize the power output from muscles of the human lower limb during bicycling. The human lower limb was modelled as a planar system of five rigid bodies connected by four smooth pin joints and driven by seven functional muscle groups. The muscles were assumed to behave according to an adapted form of Hill's equation. The dependence of the average power on the design parameters was examined. The instantaneous power of each muscle group was studied and simultaneous activity of two seemingly antagonistic muscle groups was analyzed. Average peak power for one full pedal revolution was found to be around 1100 W. The upper body position corresponding to this peak power output was slightly reclined, and the pedalling rate was 155 rpm for a nominal crank length of 170 mm.
本研究的目的是找出自行车骑行者系统（曲柄长度、骨盆倾斜度、座椅高度和曲柄旋转速率）设计参数的最佳值，这些参数能在骑行过程中使人体下肢肌肉的功率输出最大化。人体下肢被建模为一个由四个光滑销关节连接的五个刚体的平面系统，并由七个功能性肌肉群驱动。假设肌肉按照希尔方程的一种适配形式表现。研究了平均功率对设计参数的依赖性。研究了每个肌肉群的瞬时功率，并分析了两个看似拮抗的肌肉群的同步活动。发现一次完整踏板旋转的平均峰值功率约为1100瓦。对应于该峰值功率输出的上身位置略微后倾，对于标称曲柄长度为170毫米，踩踏速率为155转/分钟。
