I just want to make sure that I'm keeping my hands healthy. Due to life circumstances - recent divorce, light work load - I spend a lot of hours practicing bass everyday. Sometimes in the mornings I wake up and the index finger of my fretting hand is stiff and inflexable, so I stretch it until the full range of motion returns. Also sometimes when I am at work I'll get random aches in my fretting hand. I have heard tell of poor form and over taxing your body leading to things like arthritis or carpul tunnel syndrome (sorry about my poor spelling) ...anyway, I think of my occasional aches and pains as being like a weight lifter who has aches and pains in his muscles - normal...should I be more concerned? I do watch my form and when I begin to hurt while playing, will take a break. I do play with a fairly high action. Just how sensative is this human body, do I need to be more careful of it? I don't think I'm overdoing it - but I realize at some point you are just doing harm...how do you tell?