New Research on Muscle Loss Suggests Humans Will Really Suffer on Mars

Image: In this SpaceX rendering of a Martian colony, children watch a Starship launch in the distance. Image courtesy of SpaceX via Flickr. CC BY-NC 2.0. Article by Ellyn Lapointe. Gizmodo – March 13, 2026. Research article: Science Advances.

Keeping astronauts strong and healthy in microgravity is no easy feat. Those serving six-month missions aboard the International Space Station must exercise for two hours per day to stave off muscle loss. Pinpointing the level of microgravity at which atrophy begins would therefore be hugely helpful for establishing a sustained presence on the Moon and Mars. […]

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