발목관절 각도와 등척성 수축방향이 반대측 근육피로도에 미치는 영향

The Effects of the Angle of Ankle Joints and Direction of Isometric Contraction on Fatigue in the Contralateral Muscle

The purpose of this study was to evaluate the effect of concurrent and reciprocal isometric contraction and angle of ankle joint on Fatigue of concentrically contracting contralateral dorsiflexor and plantar flexor. Seventeen able-bodied subjects participated in the study. Concurrent and reciprocal isometric contraction were performed under three different ankle joint angles (dorsiflexion, neutral position, plantar flexion). During concurrent or reciprocal isometric contraction. fatigue of concentrically contracting contralateral tibialis anterior, gastrocnemius, and soleus was investigated and compared. There was no interaction between different ankle joint angles and direction of isometric contraction (p＜.05). No significant differences were found among three different ankle joint angles (p＜.05). Contralateral muscle fatigability was lower in reciprocal isometric contraction than that in concurrent isometric contraction (p＜.05). Therefore, the findings of this study suggest that reciprocal isometric contraction is more beneficial than concurrent isometric contraction inducing less fatigability during contralateral concentric contraction.