Okay your insights are really awesome, as someone who takes their work too seriously I think, I should focus on my health and some tips you've provided are really amazing. Thanks kmarc, SDEs need more advice (on diverse topics) like yours.
I focus rather on the non-IT "career".
As I said, YMMV... Also, take internet strangers' opinions with a grain of salt.
Let us know here next year, what form of exercise you picked up. Enjoy the ride ;)