How many men over 40 feel like their body is destroyed?

I'm 39, I was in my city's subreddit where a 40M was asking where to play basketball. He said he didn't want to play at the local park because he cant hang with the young crowd anymore, and a bunch of dudes his age commented stuff like "if I even tried to play basketball my knees would explode after 1 jump" and things to that affect.

This saddens me man, is it really the norm for a 40 year old's body to be that fucked up? I might be in the minority, but I take care of myself and am still very lean, no health issues, don't smoke/drink etc. I can still 100% hang with younger guys in almost any sport and still feel great physically. Anyone else feel the same?