I've been playing quake live for a few weeks now and after a few hours of play I notice my shoulder being very sore and almost disjointed feeling. I use palm grip, low sensitivity, and I rest my arm on the table when playing.

I'm not sure how I can fix the problem. I measured my desk thinking it may be too high, it's about 28 inches tall. My chair is about 25 inches from the seat down.

I think I'm tensing my shoulder when I aim because I recently switched to a low sense. I like low sense and palm grip but I don't want to continue to have shoulder pain.

Anyone have similar shoulder problems?