Astronauts’ Spines Under Scrutiny

NASA astronaut Kate Rubins adjusts research hardware aboard the International Space Station. Her feet are strapped to the floor to give her leverage as she works in the station’s low gravity. The longer she stays in this low gravity, the more her bone density and muscle mass will change.
Credits: NASA

For every month in space, astronauts’ weight-bearing bones become roughly 1% less dense if they don’t take precautions to counter this loss.

Mohi Kumar
Jennifer L. Turner
NASA Human Research Program Strategic Communications