Pang Zhihao, chief science communication expert of national space exploration technology, said, you must exercise in space, because in weightlessness, your muscles will contract after a long time and your strength is small. The method of space exercise is different from that on the ground, so you must fix yourself. Treadmill can't run directly, people will float, so you must fix yourself first. Fix the waist and chest with a rope, and the legs can still move.

In the past, the astronauts of the former Soviet salute spacecraft stayed in space for a long time and didn't pay special attention when they came back. Later, the life ability of astronauts was very difficult. This kind of exercise for astronauts has been strengthened since the Mir space station. This is also the experience gradually accumulated by human beings. Later, the fitness function became the standard for the long-term life of the space station.

The three astronauts will mainly complete four aspects of work during their orbit.

According to the overall arrangement of the manned mission of Shenzhou 12, the three astronauts will mainly complete four aspects of work during their orbit, and plan to carry out two extravehicular activities and operations.

Ji, assistant director of the China Manned Space Engineering Office, said that these four main tasks include:

—— Carry out daily management of core cabin assembly.

-Conduct extravehicular activities and operations.

-Conducting space science and technology experiments.

-carry out astronauts' own health management.

Refer to the above? Xinhuanet-Astronauts still need to exercise and eat for 5 days in space.