A study of bone loss in 17 astronauts who flew on the ship International Space Station Understanding of the effects of space travel on the human body and the measures that can mitigate it is growing.
The research collected new data on astronauts’ bone loss due to microgravity conditions in space and the degree of bone mineral density recovery in space. a land.
The study involved 14 astronauts and three females, with an average age of 47, whose missions ranged from four to seven months in space, averaging about 5 and a half months.
One year after returning to a landThe astronauts showed, on average, a 2.1% decrease in bone mineral density in the tibia — one of the bones in the leg — and a 1.3% decrease in bone strength. Nine did not regain bone mineral density after spaceflight, which showed a permanent loss.
“We know that astronauts suffer from bone loss in long-duration spaceflight. What’s new about this study is that we followed astronauts for a year after their spaceflights to understand whether and how the bones healed,” said Lee Gabel, a professor at the University of Calgary. , lead author of the research, who was published This week in Scientific Reports.
Bone loss occurs because the bones that normally support weight in a land It does not carry any weight in space. Gabel said space agencies will need to improve compensatory measures — exercise and nutrition regimes — to help prevent bone loss.
“During spaceflights, skeletons weaken… once the astronaut returns a landThe bonds of the remaining bones can thicken and strengthen, but those that have broken off in space cannot be reconstructed, so the general skeleton of the astronaut is permanently changed, Gabel said.
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