I've taken several of those, they're called "exercise mimetics". https://en.wikipedia.org/wiki/Exercise_mimetic https://en.wikipedia.org/wiki/Exercise_mimetic

I've taken several of those, they're called "exercise mimetics". https://en.wikipedia.org/wiki/Exercise_mimetic https://en.wikipedia.org/wiki/Exercise_mimetic Unfortunately we've not invented one that can fully replace exercise yet.