律動的ジャンプ動作中の外側腓腹筋, ヒラメ筋の活動様式について

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1) During rhythmic jumping movements, electromyographic (EMG) activities of soleus (Sol) and lateral gastrocnemius (LG) muscle were recorded to know whether their temporal and quantitative actions for ankle joint movement were different at variety of jumping height (=cycle time). 2) As jumping height was increased, EMG initiation of LG was advanced in time relative to foot contact. At maximum jumping height, EMG appeared about 200ms before foot contact. The same temporal advance phenomenon was not monitored in Sol. Sol initiation occurred consistently just after the foot contact at different jumping height. 3) EMG initiation of tibialis anterior (TA) muscle appeared just after the LG initiation, then was followed by sharply depression at foot contact onset. With increase of jumping height, these TA activity preceding foot contact increased quantitatively in parallel with LG, was expected to be responsible for the stiffness regulation of LG after foot contact. 4) During ground contact at different jumping height, both LG and Sol activities reached it peak and cessation at almost the same time, whilst the rate of increase of LG activities with height of jump was greater compared with Sol. 5) In considering the differeces of architectual and dynamic contactile properties between anatomical synergists LG and Sol, above results suggested that as jumping performance increased, temporal and quantitative patterns of force production were differing between these two muscles.
金城学院大学の論文
1988-03-20

律動的ジャンプ動作中の外側腓腹筋, ヒラメ筋の活動様式について

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