Welcome to you both. It is very important for your wife to continue to exercise. Not to exhaustion but to continue. Plus it’s also important for you as a caretaker to remain as healthy as you can. Just keep being there for her. BTW, it sounds like you’re doing a wonderful job.
Do a search for my introductory post. You may find some information.
Almost forgot, this illness is somewhat individual. How someone is affected does not mean that is definitely going to be your story.
EDIT: It’s pretty important for both of you to keep coming back here. Not only for the latest information but for the “support” of folks that are in your same boat and understand.