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Study Reveals Low Gravity Risks for Astronaut Muscle Health

3/14/2026

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Summary

Story summary

A study published in Science Advances identifies 0.67 g as a threshold below which muscle deterioration occurs.
Researchers launched 24 mice to the International Space Station to test exposure to 0.33 g, 0.67 g, and 1 g.
Mice at 0.67 g maintained muscle function, while those at 0.33 g showed weakness.
The findings suggest Moon and Mars missions with lower gravity could affect astronaut health and require further research.

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Story summary

A study published in Science Advances identifies 0.67 g as a threshold below which muscle deterioration occurs.
Researchers launched 24 mice to the International Space Station to test exposure to 0.33 g, 0.67 g, and 1 g.
Mice at 0.67 g maintained muscle function, while those at 0.33 g showed weakness.
The findings suggest Moon and Mars missions with lower gravity could affect astronaut health and require further research.