義手を装着したランナーの腕振りが走動作に及ぼす影響

抄録

In order to reveal the effect of forearm prosthesis on running motion, we measured arm swing motion of the athletes with unilateral below-elbow amputation wearing forearm prosthesis by optical motion capture, and estimated net forces and torques exerted on the shoulder and elbow joints by inverse dynamics. The results showed that wearing forearm prosthesis increased vertical, anteroposterior and lateral forces exerted on the trunk, and also increased flexion-extension torques at the shoulder and elbow joints. The arm swing was found to generate downward force in the contact phases, and upward force in the airborne phases. This result suggests that wearing forearm prosthesis increases vertical ground reaction force and step length of a runner.