Maybe it's easier to exercise the muscles on your arms when you practice this movement. I think you will feel chest pain if you do too much. Try it again. Or your chest muscles are more muscular than your arms, and your arms can't keep up with your chest muscles during exercise. If so, it is absolutely right for you to continue to exercise like this, and your body will be more coordinated; If you find that you really haven't exercised your chest muscles, then you need to exercise in a different way.