I think the same thing would be true of going to Mars. As long as people worked very hard, they would be in reasonably good shape and they would quickly recover, especially with a little bit of lighter gravity there.
I feel like I've run a marathon. I had a wonderful experience aboard the space station ... But after doing something like that, it's always good to be home.
It's a little bit harder this past week to get up and to walk to the bathroom in the morning. It's much easier in space,