「力の抜き」が出力調整の正確性に及ぼす影響

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書誌事項

タイトル別名
  • 「 チカラ ノ ヌキ 」 ガ シュツリョク チョウセイ ノ セイカクセイ ニ オヨボス エイキョウ
  • The effects of "Force relaxation" on accuracy of force control

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説明

It is more difficult to control the force accurately in the case of decreasing the force than increasing the force. When decreasing the force, it may be well controlled by insert the "Force relaxation", that is, decreasing the force over the target level. This study investigated the effects of "Force relaxation" on the control of force level accurately in isometric leg contraction tasks. Subjects increased the force from 40%MVC to 60%MVC (40-60 task) and decreased from 60%MVC to 40%MVC (60-40 task). These tasks were performed under 3 conditions; adjusting the target force directly (Direct condition), adjusting the target force after relaxing preferable amount of force (Prefer condition), adjusting the target force after relaxing completely (Cancel condition). As a result, subjects could adjust force accurately on all conditions in the 40-60 task. In the 60-40 task, on the other hand, they could adjust force accurately on Prefer and Cancel conditions compared with Direct condition. Total adjustment time from starting of adjustment to reaching the target level became long in order of Direct, Prefer, Cancel conditions. It is concluded that the accuracy in control of force level was effected by "Force relaxation" especially in the case of decreasing the force.

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