I hurt my arm in some way because of rock climbing. But I am unsure of what is wrong. May not play for a while now
However, playing Oblivion and Halo: Reach on your Xbox 360 all day does not appear to be a problem at all.
Well I have found a resolution to the problem not long after I posted this, I told Gravity about it. I simply have to put a pillow on my elbow. It is difficult to put my arm straight so kind of hard to use my mouse.