[erikpukinskis]

> wrinkling skin

A.K.A. sun damage

> decreased peak performance

Peak performance happens once. That's a mathematical truth. Just because something isn't operating at peak performance doesn't mean it's "worn down"

> all the other pieces of evidence...

There's lots of evidence that people acquire damage throughout their life. And I would certainly agree that as you approach 100 years old, the repairing slows down.

I'm just saying someone who is in their 50s and saying their body has "worn down" is not in that situation. They damaged their body. If you're 80 years old it's a different story.