From Jun. 17th to Sept. 17th in 21, three Chinese astronauts stayed in space for three months. You may wonder how they kept healthy there.
Just as you can imagine, to keep healthy in space is not as easy as that on earth. During the three months in space, they had to do xercise, eat healthy food and have physical examinations regularly.
In Tianhe's exercise area, there is equipment for the three astronauts to do exercise. For example, when they got into space at first, they did moderate-intensity (中等强度的) exercise every day, which required about 60 to 80 percent of the astronauts' maximum(最大的) strength. And the intensity gradually increased as their time in space progressed. There was also a device(装置) for the three astronauts to use to keep their muscles in a good condition. Experts on the ground could adjust the device according to their condition.
The astronauts had physical examinations every four to five weeks, including ultrasound(超声) examinations and complete blood counts(全血细胞计数).
They could choose from more than 120 kinds of high-quality and delicious food, including sap foods (主食), meat and vegetables. .
Through the above-mentioned methods, the three astronauts stayed healthy and completed all the tasks successfully in space.
A. Here are some facts for you.
B. Travelling can be hard on the body.
C. A healthy diet was also designed for the astronauts.
D. Spending too much time in space may cause health problems.
E. They did daily exercise according to their physical condition.
F. Only in this way could they used to the environment in space.
G. There are some pieces of medical equipment available in the spaceship.
