It's mainly my hips and wrists now. Sometimes upper back and neck. Gone are the days when I could consistently do 12 hours of online gaming with smack talk via the textchat, go to bed and wake up ready to do it all again.
Don't 'hurt' or anything, but legs feel weak/semi less sensation if I've been in game chair without getting up for a very long time.
After an overnight gaming session and if been awake more than 24 hrs, hands or wrists or fingers feel weak..depending on use which in turn depends on type of game played