Moving more means moving longer.

This isn't just about a metaphor but practical direction. It's not for the "old" people but every person. Beware of where you'll atrophy and crap out first. This post will help.

Have you seen The Flash? Or maybe a movie or an old show about someone who can move so fast that everyone else seems to be standing still?

That's a picture of a real phenomenon, although someone can't move that fast and we definitely wouldn't have an entire camera crew producing a shot like that. Ha!

For clarity and simplicity, the generalized rule is this: