Many Astronauts Never Recover all of their Bone Density after Returning to Earth universetoday storybywill
. This allowed the team to produce three-dimensional bone density measurements with a resolution of 61 nanometers .
The team conducted these measurements before the astronauts went to space, upon their return to Earth, and after 6 and 12 months of recovery to assess biomarkers of bone turnover and exercise. As Boyd explained using a structural metaphor, some of the loss is never fully recovered: In short, their analysis showed that astronauts experienced a 0.9% to 2.1% loss in Bone Mineral Density . Similar disparities when noted when comparing the astronauts’ overall BMD, as well as their trabeculae and cortical BMD values. These types of bone consist of the spongy, porous microarchitecture that makes up the interior structure of bones and the dense outer bone layer that makes up nearly 80% of skeletal mass .
“We need to understand the long-term effects of microgravity on bone health so that during longer missions we can be sure that the astronaut’s bones don’t become too weak. We also need to know whether the astronauts can recover once back on Earth so that they can go about doing their normal activities.
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