I know a guy who does street performance gigs. He was a serious college cheerleader (doing human pyramids, trampoline routines, etc.) in his 20's. He is still going - but when only in his 50's, he talked about how physically demanding it was (even if doing no more than card tricks for kids, or riding around in costume on a "pretty easy"-height unicycle). You gotta stay in character, in your routine, with zero mistakes - hour after hour, no matter the weather.

Ok but this guy is a wizard and extremely young for a wizard at that.

And besides - a proper wizard would be immortal.

Or at the very least, age in reverse.

Yep, age is all about your fitness in the closing chapters of life.

And a 99 year old guy just beamed into space!

Shatner is 90.

Oops I completely mixed up ages here with Betty White, another person doing exceptionally well that I just looked up.

Thanks for the correction; doing all that at 90 is still pretty good.