What is the cause of waist collapse? How to correct it?

You may be too flexible or your back muscles are too weak, resulting in excessive lumbar curvature. Lumbar collapse is harmful to the healthy development of bones. Its danger is not only the compression of lumbar vertebrae, but also all related environmental effects. First of all, the collapse leads to excessive curvature of the waist. When the human body stands upright, in order to balance the central axis, it will inevitably cause changes in chest curvature and neck curvature. At the same time, due to the increase of lumbar curvature, the iliopsoas muscle is stretched for a long time, which leads to relaxation and weakness (the external figure is obvious). Abdominal muscles and psoas muscles will also change accordingly (abdominal muscles relax, abdomen protrudes and psoas muscles tighten). Downward, it also involves the stability of the knee joint and ankle joint, and the pelvis naturally has an influence. Correction: First, you should find your own spinal neutral position. The method is: bend the lumbar spine hard, then try your best to arch the lumbar spine, just try your best, not necessarily by a large margin. Repeat the two movements, and then find the middle position of the spine between these two positions, which is the position you should keep when walking and standing. Secondly, the standing posture can be corrected by the basic standing posture of ballet. When standing with a shoulder pole, the requirements for the body are to tuck in the abdomen and lift the hips, and the hips need to be tightened inward at both sides and move forward at the rear. The muscles on the side should be tightened as much as possible, and strive to form a straight line, from the back of the head, neck, back, waist, buttocks, thighs and calves to the heel. This can lengthen the figure, and will not cause the buttocks to be flat because of tightening the buttocks muscles. If the above two statements are not clear enough, you can find the feeling of making the coccyx perpendicular to the ground. Methods: Look sideways at the mirror, bend your knees, and turn your pelvis up slightly as far as possible (similar to the action of lifting the dump truck when shoveling dirt in TV dramas or watching the Japanese commit suicide by laparotomy). Note that when doing this action, you can bend your knees first, let the pelvis feel lifted, and then stand up and practice with your legs, so that your coccyx is perpendicular to the ground. At the same time, we should exercise more back muscles and abdominal muscles.