It all depends on how each patient is affected by the disease. In the beginning the fatigue is something refered by all patients and the balance issues too, some people even have to relearn how to walk, so it's almost impossible having any physical activitie in the first months. However, vestibular therapy ans some exercises from physical therapy can help a lot with balance.
When recovering from the lack of balance , walks, yoga, pilates, can help a lot with balance, posture and reducing stress.
Some people manage to jogging, dansing, and doing some other activies. As said before, it all depends on how you're affected.