腰部運動に対する重量物負荷の影響(II)

概要

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Since 1978,we have studied to find some influences of loading on lumbar during the weight lifting motions. The last report was "An Experiment on Influences of Loading for Lumbar in Weight Lifting Motions (I), " in which the experiment was conducted by using various weight factors. In the new experiment (II), the influence of loading on lumbar was measured by changing posture, various weight factors, and by adding a twist of body while the subject is in lifting motion. The obtained results were as follows : 1) As to the rotation motions, its movement resulted from the muscular activities of the rotation side. 2) At the same time, the muscular group on the other side worked as supporting muscles. 3) As to the muscular activities of pre-lifting, A-2 (knee bent and back extended) required muscular activities which were close to those of the state of standing and presented the least amount of lumbar movement. 4) The changes of L_3-L_4 were bigger than other portions of the lumbar.
東海大学の論文