"most people shut down at the end of their day as if work is all they are" I think lack of exercise is a large part of this. Regular exercise gives you more en

"most people shut down at the end of their day as if work is all they are" I think lack of exercise is a large part of this. Regular exercise gives you more energy. I'm afraid I have no references for this, but I'm reliably informed that there are. So I would modify this as "Do exercise. Not to much. Then do what matters to you".