Advice and excercises wanted for friend with muscle wasting illness.

Hi, An older friend of mine, her husband has a disease called charcot marie tooth.(CMT) It would seem that there isnt a lot of information on it.Im told its a disease that where the loss of muscles and use of limbs is the main symptoms over time.He has type 2.Currently her husband can move slowly but balance isnt great.He wants to do some exercises to maintain his balance or maybe improve it, or strengthen his posture and muscles.I said i would mention it on here to see if anybody could possibly offer any suggestions for me to pass on.There is a website for it.With a better description than i have given.

Thanks guys.