The utility model provides an assistive device for exercise with a trunk part (11) which can contract to resist elastic repulsive force, and a pair of operating parts (12 and 13) which are arranged at the two ends of the trunk part (11), wherein the two operating parts (12 and 13) are inlaid in each other when the trunk part (11) contracts.本發明之運動輔助具具有可對抗彈性反作用力而收縮之身體部(11),與分別設置於該身體部(11)的兩端之一對操作部(12、13),兩操作部(12、13)的構成為當身體部(11)收縮時,兩操作部(12、13)會相互嵌合之形狀。O‧‧‧中心軸10‧‧‧運動輔助具11‧‧‧身體部12、13‧‧‧操作部42‧‧‧凹部43‧‧‧凸部
