16H 関節トルクおよび生体表面情報を用いた跳躍運動時の筋の活動様式

概要

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The purpose of this study is to observe the dependence of force production and stretch-shortening cycles during explosive jumping motion. To clarify the characteristic of muscle activities during counter movement jumping (CMJ) and squat jumping (SJ), kinematics, ground reaction force (GRF), surface electromyography (EMG) and skin surface index (SSI) of right leg muscles were analyzed. SSI is our contriving new method that can observe muscle activities during motion using force detection type hardness sensor. There were strong linear relationships between EMG and force, and SSI and force during isometric power test. And the changes of EMG and SSI Synchronized with the change of GRF. But as compared EMG with SSI, especially during CMJ the ascending change of SSI was faster than that of EMG comparatively. Then the difference half peak time (t_d) between EMG and SSI of rectus femoris, t_d of CMJ is larger than that of SJ. As this result, SSI might show that the rectus femoris muscle was extended at counter movement, and the hypothesis that SSI expresses the state of stretch-shortening cycles during CMJ was conjectured.
一般社団法人日本機械学会の論文
2000-11-08