Everybody's good and beat up by the time they hit 50.

You always hear former paratroopers complain about their knees and backs... my back has been cooked for years, but aside from the occasional problems here and there, my knees have been pretty good- until a couple of years ago. All of last year, I don't even think I did a single 25 mile ride. Add on to it a medication change that's not only slowed down my metabolism, but it makes me hungry all the time and I eat everything in sight... This year, I've done a bunch of small 1-2 mile rides around the neighborhood- but yesterday I did about a 9 mile ride. My knee did way better than I thought it would, but my legs were angry at me around a mile and a half. I'm still feeling it some today- not that I was pushing it- I'm just fat and out of shape.