How do you change your body posture when suspended in a weightless environment?

With the help of everything around you. For example, the bulkhead of the ship, various debris, and even the air in the cabin.

If you can't even use this (for example, in space outside the capsule), then you have to use recoil movements. For example, ejecting a gas or liquid, throwing an object, and so on. Also, if speed is not an concern, you can also take advantage of the light pressure of sunlight – the light pressure on the reflected surface is twice as great as that on the blackened surface.

1. From the point of view of physics: energy. Free fall does not affect the body's rotational movements, as the rotational force is provided by the body's muscles.

2. From the perspective of common sense: just look at the diving competition.

You can do some physical movements, but you can't do free spins.

1. People cannot survive in a vacuum, so if they float weightlessly, there must also be air, such as in a space capsule. Then you can use the reaction force of the air to rotate like a fish swimming.

2. If a person wears a spacesuit, he is completely weightless in space. The person can rotate the torso at a certain angle through the movement of the limbs, but when the original position is restored, the person returns to the original position. Because when there is total weightlessness, when the center of gravity of the person is taken as the reference frame, the resultant external force and moment experienced by the person are 0.

Both momentum and angular momentum are conserved, and if the rotation of the attitude can be maintained by one angle, these two conservation laws will not be met. If a person has an initial angular momentum, he can adjust the rotation speed by controlling the moment of inertia of his body, which can be regarded as controlling his own rotation, that is, he can rotate by his own body.

3. Many of the stunts in the movie are made with ropes, and the ropes are deleted in post-production. People will not fall in free fall for too long, and they will fall to death if they are too long, so they can't do a few movements, at most there are so many diving movements.

We are accustomed to the presence of Earth's gravity, but what happens if it disappears? What happens to the human body in weightlessness? What shape does a flame become in weightlessness?

The blood is like an upper stream, so it will be cerebral congestion.

Osteoporosis can also occur.

First of all, because of weightlessness, the body's balance receptors, that is, the cochlea, will not work normally, and it will be reflected on the human body, that is, there will be symptoms of spatial sensory disorder, but it is generally temporary, and it will soon adapt, which is equivalent to a person who has been busy with this and suddenly has nothing to do, but the child is not idle, and tries to find something to do for himself.

The body has no gravity, so it doesn't elongate, in fact, you sleep and lie down, and your height will increase, but you get up and go back.

Bones also produce osteoporosis because of lack of exercise, but it is not reflected in weightlessness The same muscle atrophy is also a very serious problem This is the first time that a long-term American astronaut returned to Earth to reveal something called space sickness and... In space ... To sleep, just put yourself in a sleeping bag and find a wall, floor or ceiling to hang on...

Microgravity is an interesting phenomenon that affects astronauts in space in many interesting ways. While space travel has some effects on an astronaut's body, such as bones and muscles contracting for a certain amount of time, a new study suggests that space travel can also have an impact on the human brain.

Funded by NASA and published inNew England Journal of MedicineIn a previous report, a team of researchers examined the brains of 34 astronauts, 18 of whom spent several months on the International Space Station and the remaining 16 on average, before and after space travel. They found that microgravity had a significant effect on astronauts, regardless of age or flight experience.

First, perhaps the most important thing the researchers found was that in microgravity, the brain somehow floated to the top of the skull. Dr. Donna Roberts, a neuroradiologist at the Medical University of South Carolina, and her colleagues reported the findings. According to their report, the brain position of the skulls of all 12 long-term astronauts underwent similar changes.

It is said that many days after the astronauts return to Earth, the floating brain will tend to remain in its elevated position. It is unclear if the brain will return to its original position, as the brain cannot be scanned again after the second flight. At the same time, no short-term astronauts showed such changes.

It is speculated that their brains may also float upwards, but due to the short flight cycle, everything may return to normal before an MRI scan captures the phenomenon.

Another change is in the part of the brain called the sulcus, which separates the frontal lobe of the cerebral cortex from the parietal lobe at the back, which becomes narrower. Of the 18 long-term astronauts, 17 were, but only 3 of the 16 short-term astronauts were. Roberts said the phenomenon "could lead to changes in function," such as astronauts suddenly finding it difficult to adapt to microgravity in space.

Some people say that negative changes in cerebrospinal fluid flow are related to diseases such as Alzheimer's disease and multiple sclerosis, but it is unclear whether it is ** or an influencing factor. For now, researchers will try to find the answer because, as you can imagine, interstellar flights – like a trip to Mars – will take a long time. It is useful to have such information at hand.

There is no doubt that weightlessness will not change the human brain.

I think weightlessness may change the human brain, and it may make the brain smarter.

I think it can really change our brains, and it can make our brains lose control.

I think there will be some changes, but they won't have much impact.

Staying in the weightless environment of the BAI spacecraft for a long time, DU is starting due to the law of "advancing and retreating".

DAO role, useless.

Specialized muscles will atrophy, people will lose weight, bones will lose calcium, and some other physical changes will occur. It's a natural adaptation of the body to a weightless environment (which isn't a problem if you're in a weightless environment all the time). But, at the moment, people can't always live in weightlessness).

People who go into space always have to return to the ground. Once back on the surface, these changes in physique become a condition. Astronauts who have been on a long-term space flight have to carry the spacecraft off the ground on a stretcher when returning to the ground, just to avoid crushing or breaking the bones that are deficient in calcium and brittle when they suddenly walk under the action of the earth's gravity.

Some astronauts are unable to stand and walk immediately when they return to the ground because their muscles are atrophied and they are unable to resist the Earth's gravity.