What will happen to astronauts when they come back from space?

The researchers also investigated the influence of space life on astronauts' bodies in detail, hoping to provide protection for manned space travel and landing on Mars in the future.

Astronaut is an enviable job. We can fly into space and see our earth from a distance. However, astronauts also paid a huge price. They have to go through very harsh physical training, be familiar with a lot of complicated operations, and have excellent psychological quality. After coming back, a series of changes have taken place in their physical functions.

Among them, the most important thing is the decline of sports ability. Space is a microgravity environment, which is different from the earth. Working in space for a long time will greatly reduce the sports ability of astronauts. According to scientific tests, astronauts' athletic ability will drop by 30% to 50% after returning to Earth. The reason is that it is difficult for oxygen to reach the muscles of human body in microgravity environment. The basis of our human evolution is to adapt to the lifestyle of the earth, not to adapt to life in space.

Therefore, we can see that there are many exercise equipments in the International Space Station. Although astronauts often exercise, their physical indexes after returning to earth are still worse than before entering space. Scientists have found that due to long-term space life, their lung function has changed slightly, and the microcirculation of their hearts and capillaries has also changed slightly. Therefore, going into space is still harmful to human function.

And this result also raises great questions for scientists' long-term space navigation and Mars migration plans in the future? After working in the International Space Station for several months, our functions will change and decline. So if we travel in space for a long time, or even live on a planet with a very different gravity from ours for a short time, can our bodies bear it? Our very relaxed interstellar travel in science fiction has always been a science fiction imagination?