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What's the name of Shen's son?

Hello, I graduated from Sport University. I studied track and field in college. Specialized teachers often guide us. Some people think that the heel should be used to transition to the sole of the foot. Some people think that all feet should be on the ground, while others think that the forefoot should be used. Sports medicine experts believe that the best way to run is to land on the forefoot. This is because the soles of normal people are arched, and their structures are like arch bridges. Most of the joints of the foot are concentrated in the front of the foot, forming the best elasticity of the forefoot, which can cushion the external vibration and protect the human body; People's feet are wide in front and narrow in back, and the front support area is large, which is conducive to maintaining the balance of human running; The braking ability of the forefoot landing is small, which makes the horizontal speed loss forward less; Landing on the forefoot can lengthen the length of lower limbs, which is also beneficial to increase the stride of running. As we all know, a runner's spikes only have nails on his front foot, which is also because he doesn't need to touch the ground when running. Therefore, in long-distance running, if you want to make the landing action light, labor-saving, elastic, not reduce the running speed, and not easy to get tired, it is best to use the forefoot landing method. It is the most inappropriate to land on the heel first and then transition to the forefoot when running. Because the reaction force generated by the foot following the ground is upward, it takes a long time for the heel to change to the forefoot to push the ground backwards, which will affect the speed of horizontal advancement; More importantly, it's harmful to your health. The gravity that follows the ground with the foot cannot be buffered by the arch of the foot, and the vibration generated is much greater than that of the forefoot, which will cause vibration in all parts of the body, including the brain and internal organs, and easily cause knee joint injury; The heel is often hit hard, which will also damage the subcutaneous fat pad of the heel and cause heel pain. Running with all feet on the ground is generally suitable for the elderly, the weak and the overweight. The way of landing on the whole sole only affects the running speed, because after landing on the whole sole, you can only complete the back pedal after rolling forward and get the driving force to run forward. But for them, the running speed should not be too fast, and it is also feasible to run and keep fit in this way. This is because their foot muscles are weak, their calf muscles are not strong, and their arch elasticity is not strong. If they run with their forepaws on the ground, their center of gravity is too high to be stable and make their bodies shake. If the whole foot touches the ground, it can reduce the pressure on the arch of the foot, increase the area where the foot touches the ground, and enhance the stability, which is conducive to their long-distance running fitness. If you consciously strengthen the elasticity of calf muscles and arch and the exercise of joint ligaments at ordinary times, after a period of running exercise, the muscles and joint ligaments of calf and foot are strengthened, and you can still transition to the way of running with the forefoot on the ground. Running can not only exercise heart and lung function, but also enhance muscle strength. Continuous and effective jogging can also play the role of consuming energy and reducing fat. However, if the running posture is incorrect, it will not only fail to achieve the ideal fitness effect, but may also bring harm to the body. Lu Jinliang, a senior coach of Beijing Xiannongtan Youth Sports Club and a famous world champion coach, summed up some runners' wrong postures and reminded everyone: mistake one: landing on the ground with all feet. Many people are used to touching the ground with all their feet when running. In fact, this landing method is not correct. Because there is no buffer and transition when landing, it is easy to "squat" and easily impact the cervical spine, especially when running on hard ground such as asphalt road. In the long run, it is easy to cause tibial periostitis. Mistake 2: The stride is too big. When people start running for fitness, they always like to increase their stride to improve the exercise effect. In fact, increasing the stride will inevitably lead to long flight time, large fluctuation of the center of gravity, heavy landing force and increased vibration to the human body. When you exercise on the treadmill, you should choose the appropriate speed according to your own ability. Stride and stride frequency beyond one's ability may increase the chance of sports risk. Mistake 3: Internal and external personality. Many people have splayed feet when walking every day. If they still have splayed feet or splayed feet when running, their knees and toes can't keep the same direction, which will increase the burden on the knee joint and easily cause injuries to the knee joint and other parts in the long run. Mistake 4: Look up and watch TV. In order to get rid of athletes' boredom, many gyms have installed televisions above treadmills or machines, so many people either raise their heads or lower their heads when running, which will increase the burden and vibration of cervical vertebrae. When running, naturally keep your head straight and your eyes straight ahead. Mistake 5: Swing from side to side. Some enthusiasts, especially teenagers, like to shake their bodies from side to side when running. They think running like this is "exciting", just like the "swinging" action of riding a bicycle. In fact, this will not only increase unnecessary physical exertion, but also destroy the linearity of running and affect the speed and effect. So, what should the correct posture be like? In fact, the essence of running is to exercise at a relaxed speed. When running, your upper body should lean forward slightly. This "leaning forward posture" invented by Russian athlete Nicholas Romanov can not only reduce the joint burden and exercise intensity, but also prolong the exercise time. The range of leaning forward should be natural and comfortable. If you lean forward too much, it will increase the burden on your back muscles; If you lean back, it will lead to excessive tension in the chest and abdomen muscles. It is important to swing your arms naturally when running. Correct swing arm posture can keep body balance, coordinate pace frequency and improve leg movements. When swinging your arm, relax your shoulders, bend your arm about 90 degrees, make a fist with both hands and swing naturally, slightly inward when swinging forward and slightly outward when swinging backward. Don't swing too much and don't use too much force. When running, the leg movements should be relaxed. One leg pushes back, the other leg bends its knees and swings forward, and the calf naturally relaxes. Depending on the forward swing of the thigh, the buttocks are driven to swing forward and upward. First, the foot touches the ground, and then it quickly transitions to full-sole landing, or from top to bottom on the forefoot or the outside of the forefoot, and then transitions to full-sole landing. I also looked up some information, I hope you can understand it ~