I have heard a lot about using your whole body for a serve and that you shouln't hit a serve, especially topspin, with just your arm. And considering I get more tired serving than hitting from the baseline, I would say I use my body well. My coach says I have a good motion and cannot see anything wrong with it. However, my elbow is killing me and I am not sure it is really typical tennis albow because it feels like it is the muscle(s) and not the tendon. I don't really understand how you can get the whipping motion needed for so much spin for a kick serve without consciously throwing your arm and elbow into it. The result of my motion is good, but how can I get the same result and motion but by not forcing my elbow into it. If I try to bend my elbow putting my wrist to my shoulder, it hurts and sometimes remains sore for up to 3 hours after hitting. I have been suggested taking it easy until my arm is used to the serve which it is by now, using the weight on a rope around a dowel, and even pushups to help the muscles in the elbow. None of this seems to touch the part of my elbow that hurts.Is there something, at least mental, I can do to help this?