Because that person had some other things on his mind, and it was easier for him to do other things.
On the surface of the Earth, our muscles and bones have always struggled with gravity, and our muscles and bones have adapted to the Earth's environment. However, in a microgravity environment, the body's muscles and bones no longer have to resist gravity and are in a relaxed state for long periods of time. However, our muscles and bones are "used and consumed". If left unused for long periods of time, astronauts will experience varying degrees of muscle atrophy and bone loss. But don't worry, after astronauts return to Earth for a period of time, their muscles and bones will slowly recover.
After astronauts work and live in a weightless environment for a period of time, they will experience varying degrees of fluid head transfer, skeletal muscle atrophy and bone calcium loss. When the spacecraft returns to the ground, the astronauts will not be able to adapt to the normal gravity environment when they return to the ground from microgravity. Astronauts often feel weak, pale, and hypotensive due to decreased upright endurance. Before the astronauts leave the capsule, medical insurance personnel will enter the capsule to assess the health of the astronauts and help them replenish drinking water and nutritional fluids. To prevent accidents, all activities will be seated after leaving the cabin.
According to relevant data on the Internet, astronaut Nie Haisheng successfully opened the exit door of the node module of the core module of Tianhe on August 20, 2021, Beijing time. The two astronauts are in very good physical condition. In addition, after leaving the module, the two astronauts carried out related work and completed the installation of the angle limiter and the extravehicular workbench on the robotic arm, and then, with the support of the robotic arm, we cooperated with each other and assembled the related equipments outside the module, so our astronauts are actually in very good health.
China's space industry is developing rapidly, and such rapid development not only contributes to and prepares people for the present, but also continues to evolve. Just as people in the past could not understand how cell phones traveled around the world, it is possible for ordinary people to travel in space in the future.