How does an astronaut recover after being in space for a long period of time?

Question: How does an astronaut recover after being in space for a long period of time?
- Keywords:
  astronaut,
  human body,
  space
Asked by Andy S to Kirsty L on 18 Mar 2025.
- Kirsty Lindsay answered on 18 Mar 2025:
  
  Roughly, for every day they spend in space they need to spend a day recovering on Earth.
  Normally they have 30-45 days of structured rehabilitation ( or reconditioning) when they get back, then they can do normal activities, but we can still measure differences in their bodies for a long time after they land.

Question: How does an astronaut recover after being in space for a long period of time?