Well maybe that works against the bone structure changes. On the other hand gravity (or the lack of it) has other effects too on the human body[1]. One needs to

Well maybe that works against the bone structure changes. On the other hand gravity (or the lack of it) has other effects too on the human body[1]. One needs to use body forces to compensate the lack of gravity. Contact forces won't help here. [1] https://en.wikipedia.org/wiki/Effect_of_spaceflight_on_the_human_body#Fluid_redistribution https://en.wikipedia.org/wiki/Effect_of_spaceflight_on_the_h...