Long-term stay in space leads to a weakening of the back muscles, which affects even long after a person returns to Earth. To such conclusion experts from the University of California at San Diego.
As reported by experts, many of the astronauts complain about back pain as during space flights and after them. To find out why this is happening, experts with MRI three times examined three crew members of NASA who conducted on the ISS from 3 to 7 months. The first time, the astronauts checked out before returning, the second is directly after it, and the third after another one or two months. As a result we found out, directly on the intervertebral discs in microgravity fundamentally has not changed, but the mass and the area of the paravertebral muscles decreased significantly. Experts do not exclude that this is one of the reasons why astronauts grow in space. Also, experts report that sagging during the flight muscles after return to Earth, at least at first, to normal is not returned. In order to understand how the changing threat as a whole, will need further investigation.
According to scientists, in order for astronauts has avoided such problems, it is necessary to develop a complex of physical exercises, with which it would be possible to tone the muscles of the spine, even in outer space.
The results of the study presented in the journal Spine.
Back problems is not the only and most serious encountered by cosmonauts and astronauts during long space flights. Earlier this month, NASA experts have expressed concern that cosmic radiation, which is very difficult to defend outside the Earth’s magnetosphere, can trigger the development of dementia and other disorders of the brain. And another study conducted by researchers from the University of Florida, showed that the fly in deep space can be very hazardous for the other most important human organ — the heart. According to experts, about this including evidenced by the fact that with cardiovascular disease faced by many members of the Apollo program walked on the moon or its orbit.