Ergometry for estimation of mechanical power output in sprinting in humans using a newly developed self-driven treadmill
Ergometry for estimation of mechanical power output in sprinting in humans using a newly developed self-driven treadmill
复制标题
使用新开发的自驱动跑步机估算人类冲刺机械功率输出的测功法
DOI：
10.1007/pl00007955
复制
发表时间：
2001
影响因子：
3
通讯作者：
T. Fukunaga
中科院分区：
文献类型：
--
作者：
K. Funato;T. Yanagiya;T. Fukunaga
在开发了一种专门设计的跑步测力计（RE）后，对人类步行和跑步过程中的机械功率进行了评估，其中受试者抓住他们前面的扶手，保持双臂伸直并处于水平位置。10名受试者在5种不同的等速步行、跑步和最大努力短跑时，将背对肌的平均水平推力（MFam）与RE下测力台记录的平均水平地面反作用力（MFfp）进行比较。在RE上短跑期间开发的机械功率与50米短跑进行了比较。RE带的平均线速度（Mv）由连接到带轴的旋转编码器记录。将根据压力设置计算的平均机械功率（MPam=MFam× Mv）与根据测力平台记录计算的平均机械功率（MPfp=MFfp× Mv）进行比较。MFfp（r=0.889）和MFam（r=0.783）均具有较高的重测重现性。MFam的变异系数（11.3%-15.8%）大于MFfp（3.3%-8.2%）。在5种不同恒速步行、跑步和短跑运动中，MPam与MPfp呈显著正相关（y=0.98x-19.10，r = 0.982，P < 0.001）。短跑时MPam为521.7 W（7.67 W · kg-1），与50 m跑时间呈显著正相关（r=-0.683，P < 0.01）。它的结论是，新开发的RE是有用的，在人体运动过程中，如步行，慢跑和短跑时的机械功率输出的估计。
An evaluation of mechanical power during walking and running in humans was undertaken after developing a specially designed running ergometer (RE) in which the subjects gripped the handlebar in front of them keeping both arms straight and in a horizontal position. Ten subjects participated in comparisons of the mean horizontal pushing force (MFam) on the handlebar with the mean horizontal ground reaction force (MFfp) recorded by force platform under the RE during five different constant speeds of walking or running and sprint running with maximal effort. Mechanical power developed during sprint running on the RE was compared with a 50 m sprint. Mean linear velocity (Mv) of the RE belt was recorded by the rotary encoder attached to the axis of the belt. Mean mechanical power calculated from the handlebar setting (MPam=MFam× Mv) was compared to that calculated from force platform recordings (MPfp=MFfp× Mv). A high test-retest reproducibility was observed for both MFfp(r=0.889) and MFam(r=0.783). Larger values for the coefficient of variation for MFam(11.3%–15.8%) were observed than for MFfp(3.3%–8.2%). The MPam, which were obtained from five different constant speeds of walking, running and sprint running were closely correlated to those of MPfp(y=0.98x− 19.10,r=0.982,P< 0.001). In sprint running, MPamwas 521.7 W (7.67 W · kg−1) and was correlated to the 50 m sprint time (r=−0.683,P< 0.01). It is concluded that the newly developed RE was useful in the estimation of mechanical power output during human locomotion such as when walking, jogging and sprinting.