NASA, Artemis II and Moon
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The Artemis II astronauts don't have a lot of space to exercise. That's why they've got the flywheel — a small device that can be used for strength and cardio workouts.
The human body isn't meant to exist without gravity. The astronauts aboard Artemis II are combatting potential physiological damage using an elegantly engineered exercise machine called the flywheel.
And they work out for two hours every single day
On the Artemis II mission, four astronauts will work, exercise and sleep in a capsule that is about the size of two minivans for 10 days. In April 2025, National Geographic worked with NASA to film the astronauts at an Orion space capsule model in Houston.