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.

Mice flown aboard the International Space Station and exposed to Mars-like gravity for roughly a month showed only partial protection against muscle deterioration, according to a peer-reviewed study ...

A bike-like centrifuge that creates artificial gravity may help astronauts combat muscle atrophy in space. Through a study at the University of California, Irvine, the National Space Biomedical ...

And they work out for two hours every single day ...

Space travel is not as easy as it looks, though. The human body is not designed to function properly outside the ...