Physical therapy can be very helpful for pain and muscle or tissue tightness. I had therapy after my thymectomy to address chest wall pain. You might want to check around and find a PT who is trained in manual therapy.

You will want to take information with you on MG and make sure they understand your limitations. Then you have to be your own advocate and not allow them to overwork you with exercises. For us, some exercise is good and necessary but too much is harmful.
Cathi

As my symptoms started getting worse I did a ton of reserch on exercise and MG. From what I can find out it depends upon if your conditions is under control or not. While I was in the hospital I discussed this with my Neuromuscle dr. She said that it was important to excerise, with in limits. She said to do this when at my storongest. When they get my condition better under control that we would discuss more physical exercise.
My neck and back muscles get tired and seem to be stiff, but this is the MG causing muscle tiredness.
Some others will have some more knowledge on this subject.
I am real new at this to be honest. It seems like the more I learn the less I know. Nice to know you happy2day.
Will

I am one month out from my first MG crisis and I've just started with IVIG. My doctor has prescribed PT as a way to begin to try to strengthen. I will have my oxygen and heart rate monitored during the therapy. Since I'm not starting until next week , I can keep you posted on how it goes. The diagnosis of MG is new for me and I figure "you never know unless you try". Its always better in a controlled setting.

My neck and mid back area get so sore and tight. I started getting weekly gentle massage (no deep tissue massage!) and it helps me tremendously. It has taken months to get all of the lumps and bumps worked out from constantly straining those muscles to hold my head up and stay upright.
~sherry

I've had physical therapy. Though I am not dx'd w/MG (in limbo here) it was prescribed for my MG like symptoms. Mostly for strengthening my arms and legs. Two things I would suggest: 1) try to get a therapist that knows about MG or one who is willing to research proper exercises. My PT was great. He, unfortunately had never heard of MG, but he was willing to do some research and talk to my neurologist. 2) As others have posted in here it is important to know your limits and be open with your therapist. The exercises may seem like simple ones, but they are not necessarily that way for your muscles. Your muscles have a cruel way of telling you that afterwards.
-Josh