Here is a serve of me just going at medium speed with my basic service motion. Can anyone please figure out why when I do this motion for an extended period of time my bicep region starts to get tender and sore? I believe that it is my Brachialis muscle that gets overused. I would also get this same soreness when I used to play dodgeball in high school after playing for a few hours. I know that typically people would throw out their shoulders or elbow but not many people seem to get my problem. So if anyone can see or give any suggestions that would be very much appreciated.
https://www.youtube.com/watch?v=JkbN-Od00MA Side view
https://www.youtube.com/watch?v=2P4lCcwkWUo Rear view
Thank you
https://www.youtube.com/watch?v=JkbN-Od00MA Side view
https://www.youtube.com/watch?v=2P4lCcwkWUo Rear view
Thank you
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