Swiss Paraplegic Research, Nottwil, Switzerland.
Med Eng Phys. 2013 Mar;35(3):283-8. doi: 10.1016/j.medengphy.2012.04.017. Epub 2012 Aug 19.
To investigate the influence of workload setting (speed at constant power, method to impose power) on the propulsion technique (i.e. force and timing characteristics) in handrim wheelchair propulsion.
Twelve able-bodied men participated in this study. External forces were measured during handrim wheelchair propulsion on a motor driven treadmill at different velocities and constant power output (to test the forced effect of speed) and at power outputs imposed by incline vs. pulley system (to test the effect of method to impose power). Outcome measures were the force and timing variables of the propulsion technique.
FEF and timing variables showed significant differences between the speed conditions when propelling at the same power output (p < 0.01). Push time was reduced while push angle increased. The method to impose power only showed slight differences in the timing variables, however not in the force variables.
Researchers and clinicians must be aware of testing and evaluation conditions that may differently affect propulsion technique parameters despite an overall constant power output.
研究工作量设置（恒功率下的速度、施加功率的方法）对手摇轮椅推进技术（即力和时间特性）的影响。
12 名健康男性参与了这项研究。在电动跑步机上以不同速度和恒功率输出（测试速度的强制效应）以及通过倾斜与滑轮系统施加功率输出（测试施加功率方法的效果）进行手摇轮椅推进时，测量外部力。结果测量是推进技术的力和时间变量。
在以相同功率输出推进时，速度条件之间的 FEF 和时间变量显示出显著差异（p < 0.01）。推时间缩短，而推角度增加。施加功率的方法仅在时间变量上略有差异，但在力变量上没有差异。
研究人员和临床医生必须意识到，尽管总体恒功率输出，但测试和评估条件可能会以不同的方式影响推进技术参数。
