Looks Like Our Backs Really Aren't Made For Space Travel
The muscles that stabilize the back shrink from disuse after months in space.By Evan Thomas | October 25, 2016
Floating around in space is gentle and effortless, but our bodies aren't built for it. You might have heard about how astronauts' bones get weaker or how their vision deteriorates. More than half of them report a lot of back pain while they're up there, too.
With no gravity to work against, the muscles that keep their vertebrae aligned sit unused for months at a time and start to weaken and shrink. A new study finds it can take months after astronauts return to Earth to get their strength back.
This muscle atrophy is a known problem in spaceflight. Research shows even with regular exercise five or six times a week, astronauts still experience weakened muscles and back problems in space.