I absolutely love this reference, and I use it all the time. Hell, I'm a walking simpsons encyclopedia.

I'm 40 next year... So far, I'm lucky. I've gone from a extremely physically demanding job (hike through back country bush, dig to 120 cm when you get there) to sitting at a desk. Where I used to not even think about the gym, I now find myself in one 5 days a week, just for preventive measures. I'm never gonna be a freakbeast muscle man, but I'll settle for not having a stroke at 60, like my dad did.