Space Daily August 24, 2026 • 01:00

A round-trip Mars mission could last roughly three years, and a model based on bone-density data from 69 astronauts predicted that everyone following the longer mission profile would return with osteopenia, while roughly one-third could be at risk of osteopor - Space Daily

The striking percentages came from a 2020 nonlinear model, not a Mars crew. Its input data predated current resistance exercise and stopped at 228 days, far short of the 1,000-to-1,200-day profile it projected.

No astronaut has returned from Mars with osteopenia. No human being has travelled to Mars at all.
The warning in the headline comes from a mathematical model published in 2020, not from a clinical f… [+9964 chars]

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A round-trip Mars mission could last roughly three years, and a model based on bone-density data from 69 astronauts predicted that everyone following the longer mission profile would return with osteopenia, while roughly one-third could be at risk of osteopor - Space Daily

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