Son in catcher that has played ball all Spring and Summer. As High School starting up he will do less, but in Fall he will still go to a few tryouts, play once a week, and maybe play a couple of tournaments. Is it best to rest arm the whole week when off, or should he still be doing some throwing during the week? Logically it would seem that rest would be good, but I have heard you need to keep doing some throwing to prevent injuries. What say the experts?