A method for measuring mechanical work and work efficiency during human activities.
A method for measuring mechanical work and work efficiency during human activities.
复制标题
DOI：
10.1016/0021-9290(93)90361-h
复制
发表时间：
1993-03
影响因子：
2.4
通讯作者：
M. Sun;James O. Hill
中科院分区：
文献类型：
--
作者：
M. Sun;James O. Hill
理解人类能量平衡的一个主要限制是准确量化人类受试者进行的体力活动或工作量的能力。我们描述了一个测力平台（2.5 × 2.5米）系统的开发和验证，用于测量人类受试者执行的外部机械功。力平台系统是在一个全房间间接热量计内建造的，因此，可以同时测量与身体活动相关的能量消耗。我们证明了该系统测量工作的准确性，该系统使用螺线管（32 kg）向平台提供受控量的能量。在对人类受试者的测试中，我们证明了该系统可以准确且可重复地测量所执行的工作、与所执行的工作相关的能量消耗以及工作效率（所执行的工作除以能量消耗）。总的来说，我们获得了高相关性（33名受试者平均为0.932），机械工作和能量消耗之间。我们相信，这种机械的功-能消耗系统将有助于确定个体差异的重要性，在调节体重和肥胖的发展中，身体活动的量和成本。
A major limitation in understanding human energy balance is the ability to accurately quantify the amount of physical activity or work performed by human subjects. We describe the development and validation of a force platform (2.5 × 2.5 m) system for measuring external mechanical work performed by human subjects. The force platform system was constructed inside a whole-room indirect calorimeter, thus, allowing simultaneous measurement of the energy expenditure associated with physical activity. We demonstrated the accuracy of the system for measuring work performed using a solenoid (32 kg) to deliver controlled amounts of energy to the platform. In tests with human subjects we demonstrated that the system can accurately and reproducibly measure work performed, energy expenditure associated with work performed, and work efficiency (work performed divided by energy expenditure). Overall, we obtained high correlations (an average of 0.932 for 33 subjects), between mechanical work performed and energy expenditure. We believe this mechanical work-energy expenditure system will be useful in determining the importance of individual differences in amount and cost of physical activity in the regulation of body weight and in development of obesity.