The phrase 'too much' implies that it’s no longer working. So yes, too much of anything isn’t helpful. If you only do 'restful' things, you might avoid other tasks necessary for balanced living and your mental health. The phrase 'too much' implies that it’s no longer working. So yes, too much of anything isn’t helpful. If you only do 'restful' things, you might avoid other tasks necessary for balanced living and your mental health.