A shocking new study has found that spending months in space can result in the equivalent of two decades worth of bone loss for astronauts.
By tracking 17 mostly-male astronauts with an average age of 47 who traveled to space for anywhere between four and seven months, Calgary exercise scientist Leigh Gabel and her team used a super high-definition 3D bone scanner at various points before and after their spaceflights to measure their bones' strength and density.
They found that the loss of bone density was most severe for astronauts who spend more than six months in space, and that those who spend fewer months were able to regain about half their bone strength and density after being back on terra firma for half a year., this study both quantifies how much bone loss astronauts experience in terms of terrestrial lifespans, and also looks at how their bones rebound after they return to Earth.
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