I `am posting this to get some insight on a particular issue. I `am somewhat new to magic, and i have been practicing my overhand shuffle for almost a month now. I`am learning how to control and retain certain cards by using this shuffle. But i have noticed that when i move the fingers on my right hand they move faster than the fingers on my left hand, which is the hand that i write and primarily do all my sleights with. I have been practicing the shuffle everyday but i have noticed that sometimes when i do it my hands (especially my left) have this slight almost locking up motion and get kind of tense i can`t really describe it. When this happens i tend to mess up the shuffle. I have noticed that my hands feel sore on some days, and that when i write with my left hand it gets sore really easily. Is this because i `am practicing everyday, because i can do the sleights very well but i`am not sure if the problem is me or my hands. I have also noticed that the amount of time of which i can practice has been dropping recently, I think because of my hands. It might also be the fact that i am always doing something with my hands, like messing with cards, rolling a coin on my fingers and palming. even as i`am typing this my finger feel sore and they don`t have much fluidity. Should I take some time off?