“Bone loss happens in humans — as we age, get injured, or any scenario where we can’t move the body, we lose bone,” said Dr. Leigh Gabel, Ph.D., assistant professor in kinesiology, and lead author of the study.
Gabel and his team traveled to the Johnson Space Center in Houston, Texas to measure the wrists and ankles of the astronauts before they left for space, on their return to Earth, and then at six and 12 months post-return. This loss occurs as a result of bones that would normally be weight-bearing on Earth not having to carry weight in space's microgravity environment.
“Just as the body must adapt to spaceflight at the start of a mission, it must also readapt back to Earth’s gravity field at the end,” said Thirsk.
'be like octupus , my friend '- bruce lee
How are they going to spend time on Mars?