Hey everyone, when I was at my local Tennis Center yesterday, I was invited to hit with another very good player before it was my time to go on court. I had to swing very hard on each shot to keep up with him, all with out any sort of warm-up or stretching. About 10 minutes after hitting with him, my entire arm was sore. Not just the elbow, but the entire arm. It was a similar feeling to when I used to throw too many pitches in Little League back in the day. I literally had to stop playing it was so bad. Has anyone ever experienced something like this before? Even a day after, the arm is still sore. Thoughts? Much appreciated.