[ExI] Astronauts Suffer Significant, Permanent Bone Density Loss in Space

[Darin Sunley]

"Gravity. It's not just the law, it's a good idea."

On Sat, Jul 2, 2022 at 9:44 AM BillK via extropy-chat <
extropy-chat at lists.extropy.org> wrote:

> <
> https://www.extremetech.com/extreme/337611-astronauts-suffer-significant-permanent-bone-density-loss-in-space
> >
> By Ryan Whitwam on July 1, 2022
>
> Quotes:
> Even after a year back on Earth, bone density does not fully recover.
> Essentially, being in space for even a few months causes your bones to
> age at an increased rate — as much as 10 years per flight.
> Astronauts who were on the International Space Station for longer than
> six months recovered less of their bone density after returning. That
> suggests that long-term missions, like the ones planned for the
> Artemis Program, could have serious impacts on astronaut health down
> the road. It also raises more questions about how humans would fare
> long-term in an environment where there is less gravity than Earth,
> for example on the Moon or Mars.
> --------------------
>
> Astronauts do exercise while on the ISS, to help prevent muscle wastage.
> But 2 hours of exercise per day means that the other 22 hours are the
> equivalent of lying in bed. I think long-term missions over six months
> duration will have to have a rotating section that provides an earth
> gravity environment using centrifugal force.
>
> BillK
>
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