Most ordinary people often feel dizzy after several turns, and can't stand on the ground, while Caiqi Yang still keeps his face unchanged after four hours' turn. Why is this gap so big?
Yang Fei, an attending surgeon in the Department of Otolaryngology, Deyang People's Hospital, Sichuan Province, said that the dizziness caused by turning in circles is essentially the same as that caused by motion sickness and playing games, and both come from the nerve organ in sensory balance: vestibule. "There is a bony structure outside the vestibule and a membranous structure inside, which is called membranous labyrinth."
"Located in the depths of the ear, there are many small Mao Mao growing inside, shaking like water plants in a cavity full of liquid." Geng, who obtained a master's degree in neurobiology from Beijing Normal University, said. This "little Mao Mao" is actually the sensory cilia above the membranous labyrinth.
"When the cell membrane is lost, it is filled with lymph. During exercise, this bony structure is moving, and the lymph is also moving. When there is more relative movement (friction) between the two, it will feel obvious and dizziness will occur immediately. " Yang Fei said.
Geng Zhitao explained that when people turn around quickly, the movement state and sense of balance of the body are roughly the same. But after stopping, the sensory cilia on the membranous labyrinth will continue to sway due to inertia, so the brain mistakenly thinks that the movement has not stopped, so although our bodies are still, the brain feels very dizzy.
What is the secret of "not dizzy"?
However, four hours after the rotation stopped, Caiqi Yang calmly said "very high" in front of the camera.
Figure skaters do other moves immediately after high-speed rotation. At least in the competition, it is rare to see players affect their level because of dizziness.
What are the secrets of these "not dizzy"?
Experts say that not being dizzy is related to personal physique and long-term training. In addition, some professional dancers said that ordinary people can be "not dizzy" as long as they master the skills.
According to professionals, one of the most important skills in spinning is to keep your eyes on an origin from beginning to end, which is called "keeping your head" in the dance world, that is, when a dancer rotates on the stage, her eyes will keep staring at a certain point, even if her whole body turns first, she will keep staring at that point until her body turns to a half, and then throw her head and eyes violently. This is the key to overcome dizziness in circles. In addition, a sense of balance and physical control are also important.
It is easy to overlook that there is also an important relationship between arm and rotation. In figure skating, you can often see different rotation speeds. Some experts say that this is mainly related to angular momentum. When the performer's hands are folded, the moment of inertia decreases, thus the angular velocity increases and the rotation speed becomes faster and faster. We can also see from the pictures of the Spring Festival Gala that Caiqi Yang's arms are slightly open and slightly lifted with the rotation, "which can also help her keep her balance to some extent".
Of course, if you want to turn beautifully, you have to pay attention to talent. According to Caiqi Yang, when she is over 1 year old, she likes to be pushed around and walks steadily. "From small to large, I have never been dizzy when I was studying by car." . At present, Caiqi Yang can rotate continuously for up to 8 hours.
What's the mystery of "carsick people"?
Accompanied by the beautiful melody, the ballet dancer spins quickly on tiptoe, and when she stops spinning, she can still stand still. For the mystery, British scientists have done relevant research not long ago, and found that long-term practice of rotation has changed the relevant parts of ballet dancers' brains and helped them reduce their dizziness. This discovery inspires scientists to develop new methods to treat chronic vertigo.
In addition, many people say that carsickness (seasickness, airsickness, carsickness) can be treated by practicing rotation. Is this statement scientific?
According to experts, motion sickness is different from a disease in the usual sense. It is just an emergency response of sensitive organisms to over-limit stimuli. It is caused by the high sensitivity of inner ear vestibule to linear motion and angular acceleration motion. The essence of this exercise is to stimulate the vestibule repeatedly for a period of time to adapt the vestibule, thus reducing the sensitivity of the vestibule of the inner ear.
It is not entirely unreasonable to treat carsickness by practicing circles. If you are a child, you can ask him to hold an adult's leg or a tree in circles, and exercise once a day for about 15 minutes each time, and gradually increase the number of circles. You can play games to avoid boredom. For young people in their thirties and forties, the sensitivity of vestibular organs in the inner ear is lower than that of children. Only by persisting in long-term exercise can we achieve good results. This kind of people can take the way of in-situ rotation, raise their arms horizontally, turn around in situ, gradually speed up, take a break when they feel dizzy, and then practice after the dizziness disappears.
However, it needs to be reminded that we must pay attention to gradual progress and not rush for success, because blindly increasing the number of rotations will lead to excessive exercise and fainting.
■ Extended reading
All that stuff about the spin talent
The Queen of Spinning Dance: 1 min for 70 turns.
According to the Oriental Guardian, Coco20 1 1, known as the Queen of Spin Dance, used to spin 70 times a minute in a famous brand city in Taiwan Province Province, and was regarded as the only woman in Asia who can spin dance.
It is understood that Coco can not only rotate 70 times in 1 minute, but also rotate beautifully, making it a dance. Even if you wear a 20 kg dance costume, you can keep spinning 15 minutes.
Old people declare Guinness: continuous rotation of 20,000 laps.
According to the Yangzi Evening News, an old man named Zheng Kuanqin accidentally discovered that he could spin in the process of dancing, and his friends couldn't beat him. After an hour or two, he didn't faint at all. So, he began to consciously practice rotation, 3 hours, 5 hours, 8 hours, and the time turned longer and longer, and the most time was 10 hour. At first, he just turned left with broken steps or three intermediate steps. Later, I practiced writing, drawing and eating while rotating.
The water tank on the little girl's head: crazy rotation for 40 seconds
Last March, a dance video of North Korean children became popular on the Internet. In the video, a North Korean girl's head water tank rotates rapidly for 40 seconds, which is jaw-dropping and can be called "anti-heaven" dance.