In the process of martial arts practice, we often hear the concept of "three knots and four tips". But many people may not understand what the "three sections and four tips" are, let's talk about it briefly. The hands and feet are the four ends of a person, and the three nodes are the root joints, the middle joints, and the tip joints. Take the arm as an example, the shoulder is the root joint, the elbow is the middle joint, and the hand is the tip joint. Where do we start to exert our power when we throw a punch?Remember that it is not the hands that move the body, but the body that drives the shoulders, the shoulders that drive the elbows, and the elbows that drive the hands. In the same way, taking the leg as an example, the crotch is the root joint, the knee is the middle joint, and the foot is the tip joint. If a person is standing, then the feet are the root joints, the hips are the middle joints, and the head is the tip joints. 
We need to make it clear that the movement of the human body is not just a simple muscle contraction, but the result of multiple links working together. Only by deeply understanding the functions and characteristics of each link can we better control the fluency and strength of the overall movement. For example, when punching is the body driving the hand (the body driving the shoulder, the shoulder driving the elbow, and the elbow driving the hand), rather than the hand moving with the body. The same is true for leg lifting, leg lifting is the crotch driving the leg movement, not the leg driving the body movement.
Pat the fireworks around you There are martial arts writings that say that the body is based on the waist, but in fact the view that "the waist is the axis" may not be entirely accurate. It should be based on the feet as the axis, the feet do not move, the body can rotate at will, the shoulders and hips can move, if it is said that it is the waist as the axis, the body is difficult to rotate, can only move back and forth. Referring to the principle of leverage, we can find that the rotation of the human body is mainly achieved through the fulcrum of the toes, while the waist plays more of an auxiliary role in maintaining balance and adjusting posture. In actual combat, the strength of the waist and abdomen is indeed important, but it is more used to perform delicate operations such as various clever transitions and continuous strength, rather than controlling the direction of rotation.