That would make people who ride older rail trains (like Chicago's trains) regularly super healthy. People who ride horses would be super healthy, too. Train con

That would make people who ride older rail trains (like Chicago's trains) regularly super healthy. People who ride horses would be super healthy, too. Train conductors. Anyone who does a lot of off-roading. Etc. Oh actually, people who have shaky legs would have disproportionately healthier legs than the rest of their body. But actually moving around a lot wouldn't make a difference if the bits in your cells are moving around at hundreds of miles per hour.