I just recently bought my first traditional bow (a Great Northern Fieldbow) and have started practicing in my basement, where I've set up a ~9 yard range. Anyway, the shooting has been going well, but just recently I developed some soreness in my bow hand around the base of my thumb. If I lay off of shooting for a few days it gets better, but then comes back as soon as start shooting again. My bow has a stright grip, and I have been rotating my hand clockwise just slightly on the grip (I'm right-handed) when I shoot to avoid arm slap. If I rotate my arm back counter-clockwise, the string slaps my arm. Because the string slap is the more painful of two, I quickly go back to rotating my grip. So, my question is... could the slight hand rotation be the cause of the soreness, or is it because I'm new to the sport and I'm using muscles in my hand that don't normally get used? Any help would be much appreciated.