OOOOH, YEAH!
Emotional stress (good or bad) can cause pain, make me catch a cold, feel absolutely exhausted...
Working the muscles too much in the wrong way can make me upset, confused, have digestive problems...
It seems that I am one big blob of confused signals, with the brain firing off random reactions to random activities. Sorting it all out seem impossible! So I try to stay on an even keel, as Robin said.
Easier said than done, of course!
Debbie