Originally Posted by DavaiMarat
So it's hard to argue that the body doesn't contribute at all let alone not playing a major role in power and rhs.
The body do contribute to the the speed of your arm. But the main power of your arm is not by itself, but by the fact that body slow down:
Run 25m/h on the train with 50m/h your speed is absolutely 75m/h. Now if the train suddenly stop: You will get kill by your enormous speed instantly.