After astronauts return to Earth, they need to be lifted up once they land and are in wheelchairs for a long time. After that, they undergo a series of recovery processes, which take about 3-6 months. All the astronauts have to do is readjust to Earth.
The Shenzhou XIII crew has lived in outer space for 183 days, which on one hand has set a new record for the length of time Chinese astronauts have stayed in space on a single mission; on the other hand, the long time spent in space with strong radiation and microgravity has put a certain burden on their bodies, which includes radiation-induced illnesses and changes in the central nervous system, etc. The crew has been in space for more than 20 years and has been working for the first time in China.
Space weightlessness
Outside the Earth, astronauts have gradually adapted to the weightless environment, just back to the ground when again feel the gravity of the Earth, the human body upright blood pressure regulation ability is insufficient, the emergence of postural low blood pressure, may be fainted, which is also is the body of the Earth's gravity appeared "not used to the earth" situation.
Muscle atrophy
We all know that astronauts go to space through manned spacecraft, life in space are in the absence of the Earth's gravity under the premise of action, astronauts, the body is accustomed to the environment in space, for a long time no longer carry out the body's functional movements and muscle movement, over time, it will be to the astronauts The first step in the process is to make sure that the astronauts are able to keep up with the demands of the environment, and that they are able to keep up with the demands of the environment.
Effects of radiation
Radiation is the biggest problem facing astronauts exploring Mars. Astronauts are exposed to 20 times more radiation in space than on Earth, and if they travel to Mars and into outer space, the radiation exposure is hundreds of times more than on Earth, perhaps as much as 300 times more". The effects of radiation on the heart, blood vessels, bones, central nervous system and brain, as well as the risk of cancer. That's why astronauts need to will have annual medical checkups.
Heart shrinks
The human cardiovascular system doesn't need to work as hard in space as it does on Earth. The human heart, like bones and muscles, was originally designed for Earth's gravitational environment, and in space it doesn't need to beat as powerfully and is smaller in shape than it does on the ground. When returning to Earth from space, astronauts may feel dizzy.
Physical problems
Astronauts returning to Earth have to readjust to gravity and may have problems with balance, and may not be able to perform simple actions such as standing, walking or driving. Astronauts returning to Earth are systematically conditioned and their bodily functions generally return to normal within one to three weeks, unless there is a severe loss of bone or muscle, which can take months or years to recover.
What kind of recovery do astronauts need to do when they return to Earth?
1. 14-day isolation period
This 14-day isolation period is designed to gradually acclimatize the astronauts in their apartments to the Earth's living environment with gravity, and the first training goal is gravity re-acclimatization training, which restores the body's stability in standing. When standing exercise is performed, it can also promote the recovery of osteoporosis and muscle atrophy, and enhance the body's immunity. Cardiovascular, vestibular, skeletal, and fine motor training will also be synchronized.
2.23-day medical convalescence period
During this period, specialized staff will also check and monitor the astronauts' physical condition, and carry out reasonable institutional training according to the astronauts' recovery status to ensure that they can recover to their normal physical condition faster and better.
3.3-month recovery and convalescence period
"The main content of the recovery training is a combination of gradual physical exercise and a high-protein, high-calcium diet, plus medication assistance and convalescence. Arrangements are usually made for them to convalesce in a place with good ambient air, and the selection of this place is usually kept secret.
Reviewing this half-year "business trip", can be said to be full of dry goods, wonderful. Astronauts are admirable, they face unknown risks that we can not imagine in order to explore space, every space hero is worth remembering.