How else would you survive a zombie apocalypse?
Well, you got me there, can't argue with that!
Your body is the one possession that you know you will have for the duration of your life. It's your vehicle, entertainment center and dwelling all in one. So for the same reason you would take care of your computer or clean your house, you should take care of your body. Exercise is one of the best things you can do for both your body and your mind.
You're absolutely right, and under better circumstances it'd be an excellent argument to make. Thing is, I'd rather have died years ago and if my heart were to give out today, it'd be doing me a big favor. As for the psychological benefits, they're pretty slim on a daily basis even if I manage to stick my schedule. I'm sure I'd feel better about myself if I were toned... but I have little to no confidence I can pull that off with my **** genes, and when all I have to work with is my own body weight. And come to think of it, being ripped wouldn't really help me in any concrete way either unless I take up manual labor or sports or something.