歩行中の筋活動による消費パワーの推定(3部評価・診断)

概要

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Energy consumption during level walking was calculated from the gait data using the mathematical model. Gait trajectories of 3D location of lower limbs and floor reaction force data were measured with an automated gait measurement system including 4 sets of high-speed video cameras, force plates, a foot contact measurement system, EMG telemeter and a small computer. The subject was a nomal female who walked at fast, moderate fast, usual, and slow speeds and stood still on a level walkway. The data were fed into a mathematical 3-link model to get joint moments. The joint moment data were fed into a mathematical muscular skeletal model to obtain muscular force f and velocity v of 8 muscle groups of lower limbs. We have defined stimulation index (st) as follows, when v≧0; [numerical formula] when [numerical formula] when [numerical formula] With this index Hill's constant could be calculated by [numerical formula] [numerical formula] Finally, energy consumption was estimated by [numerical formula] [numerical formula] Energy comsumption per unit time was calculated by integrating P during one walking cycle and divided by the cycle time. This value was compared with the literature value, which was calculated from O_2 consumption data. The values had good agreement. Energy consumption per unit distance was also calculated. The value at the usual speed was the lowest.
バイオメカニズム学会の論文
1990-09-10