How do you balance exercise and MG?

I was diagnosed in 97 and I've learned that exercise should not be long sessions. I therefore do every day in the morning for 8 minutes - mainly strength training/ kettlebell swings to cover full body. Little and often is the way to go!

I'm 73 and was diagnosed with ocular MG last fall. I have been on IVIG infusions for several months, as well as Azathioprine. My droopy eyelid comes and goes, with sensitivity to bright lights, but so far no other symptoms. I have taken yoga classes for about 12 years because of several herniated discs in my back, and just recently I started working out at the gym before yoga with a trainer to help strengthen my muscles overall. I'm trying to get ahead of it as much as I can!

Began to use resistance bands at moderately high resistance a few months ago. They have made a difference. The advantage is that they are in the house and, depending on the day, I can workout for thirty minutes or so or parcel out various exercises throughout the day. No driving, parking, or membership fees involved. I has been going well for a mid-70s year old man. Walking is a problem, a major downer for a man who ran for 29 years. But, that is MG. It is my choice if I want to whine about not being able to run (or walk very far) or to be grateful that I was able to do it for so long. I was diagnosed in 2009 and have used mestinon since and, as of 2019, have been on mycophenolate with fairly good effect.

How does one differentiate between exercise- induced weakness and shortness of breath and MG-induced muscle weakness and shortness of breath?
I'm not crazy overweight but I've not exercised for many years because of sciatica. I'm now all healed from back surgery but I need to take off excess weight from being sedentary.
Advice?