I got aches and pain from old age (back, knees, joints), can't say I have had injuries from gaming, have been doing it since 1979. Worst thing I got was a few blisters, including one from playing Third Strike on the PS2. Was on the last boss, noticed I had a blister, ripped that son of a bitch open, and proceeded to beat the boss and my thumb felt like it was on fire as I was still rubbing it across the directional pad. Felt manly at the moment, but that blister stung for several hours before it finally calmed down and quit hurting.