Im talking physically, not mentally....

The past year or so, I feel like my joints have been on a down hill slide...
I play racquet ball and my knees hurt for a day or so
I jog, and my knee hurts for a couple days....
I sleep a certain way, and I wake up with a stiff back
I have this wicked tennis/gold elbow I have been trying to get rid of.

I feel most of this is from being active but, hell, its just making me feel like I am falling apart and I am only 31

I think a lot of it was being obese as a kid and playing sports but injuries always seemed to heal faster back then....

Anyhow, at what age did everyone else feel like they are old.....

By the way, I still think I can party like I'm 21 haha