You don't need Earth gravity. All the problems with bone loss and ailments are from microgravity. I can't find any studies on reduced gravity (it would be rea

You don't need Earth gravity. All the problems with bone loss and ailments are from microgravity. I can't find any studies on reduced gravity (it would be really hard to test), but there's no reason to assume that something like half a gravity + exercise and supplements wouldn't significantly reduce health issues.