Still, limit setting is very helpful, even with small children. It is also helpful to know what we can and cannot affect. For instance, I have had to learn I can not change others. I was once reminded by a friend that setting goals was a good thing but if not accomplished in the time frame set, modify the goal. That is very good advice, Judie.
Flexibility is very important.
The chemical reactions have to do with increasing adrenaline, the stress hormone. It also affects blood sugar. Depression is definitely affected by stress and visa versa. Of course, when you are stressed and too busy, also when you are depressed, it is hard to get yourself moving but that is exactly what will help a tremendous amount. I know people who seem to feed their creativity off that stress.