Personally, I think it is helpful, but the effect is definitely not good. Although these two groups of movements are the same part for muscle exercise, actually hanging the curved arm is a relatively labor-saving group of movements, which has limited effect on muscle exercise, greatly affects the position of the receptor and greatly reduces the effect. Muscles are usually exercised more effectively between relaxations. It is difficult to practice endurance for a certain period of time. It is recommended to take it slowly and gradually increase the intensity.