How do astronauts practice self-care in space?

It's tough to practice real self-care when the internet's obsessed with #self-care. Let Mashable help with our new series Me, My Self-Care & I.Self-care is important for all humans, including those floating in space. 
Think about it. If it’s challenging enough to incorporate self-improvement and wellness-boosting techniques into our daily routines, with the benefits of social connection, the pull of gravity, and fresh air at our disposal, how hard must it be for astronauts?