Samantha Cristoforetti: Let's get physical
11 June 2015 Last updated at 17:14 BST
We all know that exercising and staying fit is a big part of having a healthy lifestyle. But when you're in space, it's not that easy!
You can't run around in the park or go for a swim like we can on Earth.
Samantha was on the ISS for nearly seven months and the only way to keep an astronaut's muscles and body active is by visiting the 'space gym'.