Posted by: Sichuan Online - Sichuan Daily
2003 Chinese Sohu Everest hiking team's triumph, so that more people began to pay attention to extreme sports. More and more people ask: Does the human body have any limits? How can people find the maximum limit of their body and use it rationally?
Motion and physiological limits
We often hear about some super physical events: an African can use both hands to hold two opposite directions at the same time
The car; an American double-handed with 461 kilograms of large stones, walked 8.84 meters; an odd Chinese country had been lying on a wooden board covered with broken glass, weighed about 50 kilograms of large wood board, so that more than a dozen The spectators step on the wooden boards. Although there is currently no scientific conclusion on these phenomena, in the emerging “human limitology†in recent years, more and more experts have conducted in-depth discussions and hope to find the human body through genetic, genetic, and other research. limit.
Dr. Zhang Wei of the Center for Mental Health of Chuan University West China Hospital had encountered such a thing: When an old woman, who was nearly 70 years old, caught fire at home, she pushed the piano out of the house. After the fire, no matter how hard she tried, the piano would not move. Zhang Yu said: "The physiological limits of human beings are often due to the direct effects of mental factors, and they will show different states. Some scientists explore human physical problems from the perspective of spiritual strength and show a series of people in dangerous events. The comparison of the examples of great physical strength found that: spiritual strength and the will to survival can improve physical strength and endurance."
Near limit
Yin Lixue, chief physician of the Department of Cardiology at the Provincial People's Hospital, told reporters: To discuss the extreme sports of the human body, we must discuss the limit of the heart movement. In general, the limit of the heart's movement, which is the maximum human heart rate, has a formula:
(220-age) +/- 10-12 beats/min, but the influence of physiological genetic factors and the level of physical exercise determine the maximum heart rate and cardiac output. From a medical point of view, the pre-exercise nervous state, the number of muscles participating in the exercise, and the severity of exercise, as well as the height of the adrenaline elevation and the strength of myocardial contractility at the peak of the exercise, affect the heart's maximum heart rate. At present, there are two methods for measuring the movement limit. One is a treadmill exercise test, and the other is a flat exercise test. The mechanical tests are used to predict the maximum intensity of human body movement.
Participants in extreme sports use their modern high-tech methods to maximize their potential. In addition to the pursuit of "higher, faster, and stronger" that athletics exceeds the physiological limit, extreme sports emphasizes participation and bravery. “Looking for limits is an unpredictable process.†Wang Xiao, director of the Department of TCM Orthopaedics and Traumatology at the Department of Sports Medicine, Chengdu Sport University, pointed out: “Scientists have demonstrated through experimentation that the physical limits of human motion can be qualitative but not quantifiable. This means that sports There is a kind of uncertainty about the limit, and it is impossible to quantify the extent to which it is considered to be the limit.For example, at the time of running 100 meters, it was predicted that the limit was 10 seconds, but now it has reached 9.79 seconds, and there are still many athletes who are trying to break through this. Work hard for records. For a variety of reasons, people generally cannot reach the limits of the movement and can only approach and improve indefinitely. At the same time, it will be slower to increase speed and time."
Tap potential
What is the potential in the human body? A survey shows that normal people read 30-40 pages per hour, and trained people can reach 300 pages per hour; when the brain is excited, only 10-15% of the cells are working; the human brain can store more Up to 10 signals, but only a small part of the memory; the human skeleton's bearing capacity, such as the femoral joint capacity is 3-4 times the weight, the knee is 5-6 times, the lower leg can withstand 700 The force of kilograms, the distorted load force is 300 kilograms. It can be seen that human beings can overcome many hereditary weaknesses and challenge the limits by exploring potential forces hidden in the human body.
How to tap potential? Experts believe that in order to reach the limits of physical health, we must have good psychological qualities. A stable personality, without extreme excitement, suspicion, and having a positive life and mentality, is a prerequisite for the development of potential human power. Only by actively developing people's psychological potential can we promote the joint development of physiological potential.
Extreme sports enthusiasts are better than ordinary people? Wang Hao thinks: Not necessarily. Extreme sports, like emergency events, keep people in a "fighting" state. As soon as this process is over, the body will be weakened, and in the long run, it will also cause some chronic diseases. This is the price of advance overdraft. Therefore, when we challenge our own limits, we must pay more attention to the courage and confidence to participate in the challenge.
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