Why can people stand still and not fall down

Conforms to all standing mechanical characteristics.

One of the signs of human appearance.

For a long time, walking upright was considered one of the signs of human existence, but there have been many opinions in the academic community about how people "stand up". A new study by American scientists has found that walking on two legs consumes only a quarter of the energy of a chimpanzee walking on all fours, and it is much less labor. This may explain why our ancestors ultimately chose to travel on two legs.

This paragraph] humans vs chimpanzees Walking is more energy efficient.

According to the British "Independent" on July 17**, anthropologists from the University of Arizona and other institutions in the United States selected four human volunteers and five chimpanzees as research subjects. By measuring the amount of oxygen they consume while traveling on the treadmill and the force they exert while traveling, the energy they each use is calculated. It was found that the gait of a man walking on two legs saved 75% of energy compared to the gait of a chimpanzee walking on all fours.

This finding is a strong case for the establishment of an upright way of walking in humans that is related to energy expenditure, and that it requires less food. "Researchers have debated for decades about the role of energy consumption in the evolution of upright walking," said Richard Richlen, a professor of anthropology at the University of Arizona.

But the problem is that there is little strong evidence to support this idea in the past. ”

This paragraph] chimpanzee vs chimpanzee takes a big step and is more efficient.

The scientists also studied and compared the energy consumption of chimpanzees in the asynchronous state. Overall, there is little difference in the amount of energy used by chimpanzees to walk on two hind limbs or on all fours, however in individuals, some chimpanzees are more energy-efficient than walking on all fours, some are similar, and some use more energy, depending on the size of their stride, the larger the stride, the more energy-efficient. Professor Richren said

We linked the energy consumption of chimpanzees to their bone structure, and through biomechanical models, we found out why some chimpanzees are more energy-efficient when they walk on two legs than their counterparts......This difference is surprising and exciting, because when it comes to evolution, difference is the most critical, and there is no evolution without difference. The team believes this could uncover the secret of the gradual lengthening of the legs of early human ancestors over the course of evolution. If an individual can exercise and hunt in a more energy-efficient way, and save more food, new species will evolve according to the theory of "survival of the fittest".

These experiments and studies have shown that energetics played a very important role in the evolution of bipeds.

Summary. Hello, there are several reasons why people stand and fall: 1

Cerebral insufficiency caused by various causes, such as transient ischemic attack, with a black star in front of the eyes at the time of the attack, and no abnormality after recovery. Insufficient blood supply to the vertebrobasilar artery is mostly due to vascular compression caused by atherosclerosis of the cervical blood vessels or degenerative changes of the cervical spine, and vascular ultrasonography or angiography is required to confirm the diagnosis. 2.

Hypoglycemia, which is more common in people who are emaciated or have diabetes. Low-sugar coma caused by poor diet usually recovers quickly after glucose supplementation, and blood sugar is significantly lower than normal at the time of the attack. 3.

Caused by heart disease, which is more common in older people or people with congenital heart disease, such as Arthur syndrome. It is recommended to go to the hospital.

Good. Hello, there are several reasons why people stand and fall: 1

Cerebral insufficiency due to various reasons, such as transient ischemic attack, leakage or black star in front of the eyes at the time of the attack, and no abnormalities after recovery. Insufficient blood supply to the vertebrobasilar artery is mostly due to vascular compression caused by atherosclerosis of the cervical blood vessels or degenerative changes of the cervical spine, and vascular ultrasonography or angiography is required to confirm the diagnosis. 2.

Hypoglycemia, which is more common in people who are emaciated or have diabetes. Hypoglycemic coma caused by poor diet is generally recovered quickly after glucose supplementation, and blood sugar is significantly lower than that of the regular plexus at the time of the attack. 3.

Caused by heart disease, which is more common in older people or people with congenital heart disease, such as Arthur syndrome. It is recommended to go to the hospital.

Under normal circumstances, this is the first reason<>

Because basically a lot of people do. Good.