So this is more of a health related question pertaining to archery. As most of you know, I'm in the process of switching to left handed. I do a lot of drawing drills (just practicing drawing back, holding, then easing down). RJ recommended about 1000 of these "reps" to get the cycle built into muscle memory. I work out regularly, but I'm certainly using muscles in different ways (i.e. putting stress and strain on them). I'm getting much more smooth in the my drills, and can last much longer holding than before, but how much drawing back, letting down (even just firing) can our bodies take in the long run? I'm only 23, but I've been shooting since I was 14, and plan to shoot even more frequently as I get more into it. I stay in shape, and try to stay healthy, but you have to wonder if frequent shooting (I'm talking not you're weekend warrior) can lead to shoulder injuries/detoriation. I don't want to loose a lot of shoulder/arm use by the time I'm 60 because I over did it, nor do I want to mess with anything serious like rotator cuff issues at that age. So what are your thoughts on this?