Gravity is very weak in the orbit of our planet. Under these conditions, the human body changes: the intervertebral discs are moistened and expanded, the intervertebral column is extended and the growth increases by 2-5 cm. This is already noticed in space for the first two to three days.
NASA’s work with participation showed that in the early days of the task, the average growth of the ISS increased by 3 cm for most participants. Japanese astronaut norisige cana recorded at a record value – 9 cm.
In this case, the extension of the spine may cause a violation of problems, posture, back pain, on the way back to worldly gravity. And if a person is in space for a long time, the muscles will decrease atrophy and bone density without physical activity. That’s why astronauts do daily sports in ISS.
Source: Ferra
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