This. Exercising has made all the difference. I'm more alert which leads to productivity. Used to be a night owl and barely got anything done in the day. Also,

This. Exercising has made all the difference. I'm more alert which leads to productivity. Used to be a night owl and barely got anything done in the day. Also, I now stop coding after say 10pm even on personal stuff, I make notes and pick it up the next day. That buggy block of code you churned out at 2am will be detrimental in the long run and your health isn't worth it.