yup, get him back to the gym, if he can find a Pilates instructor to work with it may well be beneficial......and as far as the sun goes, we are talking 15/20 minutes a day at full sun.....with a fair amount of skin exposed.....not enough to burn.....but up here in our latitude, supplementation is really necessary.....B12 is prob. not his problem, but that test is open to faulty results.....good luck