I have balance issues, too, but not very bad in recent times. I do get tired easily from sitting up straight, I do think sitting straight effects my ability to walk properly. I get bruised all the time, like Annie, from running into things. The reasons vary, sometimes my body is tired and it doesn't quite move the way I want it to, and other times I have slight double vision and misjudge where to step. Walking slower really helps. My kids tell me that I walk like a penguin now that I have MG, even when I think I am doing fine and am not aware of walking oddly.