Taking round piles as an example, let me talk about the requirements and essentials of piles.
The basic points from top to bottom are:
Lack of energy, tongue and palate, heavy shoulders and elbows, lifting anus and abdomen, loose waist and heavy hips, and chest.
Let's not talk about the mysterious statements such as meridians and qi and blood circulation here. From the point of view of combat, these should be the necessary conditions for a soldier to fight against the enemy, and they are indispensable.
Xu Ling's top strength is to lift on the Zhen point, strengthen Baihui point, shrink the chin and stick the back of the neck slightly, so that when the head is hit, it can at least slow down the impact on the neck and cervical vertebra.
The tip of the tongue and palate? In fact, the tip of the tongue is used to hold the joints between the upper incisors and the upper jaw to prevent the incisors from being knocked out, which can play a role in protecting teeth.
Sinking shoulders and elbows is to sink the muscles of the shoulders and back, so that the fist force of the waist and buttocks can be better transmitted to the arms.
Relax your waist, sink your hips, lift your anus and abdomen? In order to keep the whole body in a state of "full strength" when twisting the hips and transporting the waist at high speed, it will not be washed away by its own muscle strength.
To sum up the above points, in fact, there are so many essentials for standing piles, not for anything else, but really for being able to fight and fully mobilize the whole body.
The grandfathers of Wulin are not stupid. Many things they designed are really wise. The purpose of standing piles is to familiarize the body with the physical state in fighting and feel the frame structure of each joint of the body, especially the spine. The ancients called this dajin. If you practice this big muscle well, you will be able to communicate with your mind, your blood will be smooth, your body will be different from ordinary people, and your body will be much better.
Of course, all training is to be able to fight, which is clear from the theory of Yiquan by Wang Xiangzhai, the ancestor of Yiquan. Therefore, it is self-evident that there is no problem of round crotch and closed crotch in boxing practice.
Because the spine and pelvis are the "real bodies" of martial arts practitioners at home, the fluctuation movement of the spine up and down and the left and right movement of the pelvis and hip joint are the "techniques" of family-run boxing. As for hands and feet, they are just sticking out tools.
The joints of lower limbs, waist, hip and spine as a whole can be twisted like a whip, forming a spring, bow and whip, which can eject the force from top to bottom. This way of energy transfer can form a whole strength and attack. In this respect, primate apes and orangutans closest to humans can use these powers spontaneously without training, and their animal instincts of waist, spine, arms and legs will not be almost lost because they walk upright like humans. Therefore, apes and gorillas can easily climb, jump and sway in forests and mountain streams, which humans can't do unless they grow up with these animals without losing their instincts, such as Mount Tai in the movie Mount Tai of the Apes.
Let me give a simple example of Xingyiquan practice method to illustrate the application of the essentials of standing piles:
Your feet should be shoulder width, and your hips should be slightly sunken. Don't kneel, keep your upper body upright, put your arms flat on your chest, twist your waist, turn your hips, push the ground and send your arms. Your shoulder will be torn. When you reach the end of your palm, you have to sit back and accelerate your hips again, just like recoilless gun. If you don't sit on your hips, you won't be able to bounce, but if you sit on your hips too hard, your mobility will be poor. This is a contradiction, so you can only control it properly, but it is also the most important place to practice Tai Ji Chuan's strength. This is the so-called "beating people like a whip", which requires long-term practice to achieve the effect. You can shake the towel at ordinary times and experience the feeling that the end suddenly accelerates to withdraw. In the braid play of the Qing palace, eunuchs often flog in the Forbidden City, which is similar to this principle.
In addition, let's talk about the problem that many practitioners tend to kneel. Why do some people's knees always exceed their toes?
In order to lower the center of gravity of the pile horse, people who didn't close their hips at first either bent their ankles excessively or turned their hips up. Because the curvature of the knee joint is equal to the sum of the curvature of the ankle joint and the curvature of the hip joint (the internal angles of parallel lines are equal, so draw three auxiliary lines at the ankle joint, knee joint and hip joint). That is, if the top cannot be bent, then the bottom must be bent. However, the former is easy to cause knee injury, while the latter leads to qi and blood stagnation. All martial arts practitioners who have practiced Tai Ji Chuan Pile for some time should have this experience. The whole energy will be broken in this place, and the qi and blood will come to an abrupt end in this place, making it difficult to reach the ends of limbs. There is a famous saying of Wulin predecessors: "The hips are convex and the waist is thin, and the handle is not high." That's what I said! This problem can be explained by the stress concentration of engineering material mechanics, which is why the "ma bu" or horse stance just look pile should stand in the shape of an arch bridge.
(In order to avoid stress concentration, it refers to the phenomenon that the local stress inside an object increases, which generally occurs in places where the shape of the object changes dramatically, such as notches, holes, grooves and places with rigid constraints. Stress concentration will lead to fatigue cracks in objects and static load fracture of parts made of brittle materials. )
I realized that there was basically no nonsense and I didn't play word games. I hope I can learn from all the experts, learn from each other's strong points and be pragmatic and not mysterious.