Why do joints ring during exercise?

1 The air bubbles in the joint cavity burst, and there is joint fluid which can play a lubricating role, and the fluid contains gases such as carbon dioxide, oxygen and nitrogen. During exercise, joints will be squeezed. After the joint capsule expands and contracts, the gas will be released quickly, forming bubbles, which will make a noise when it ruptures.

Tendons slide on bones, which are formed by many muscle tendons and a large number of ligaments firmly grasped, which can avoid unnecessary friction and collision between bones. Therefore, during exercise, the tendon may slide on the bone and occasionally make noise.

3 Insufficient secretion of joint fluid When arthritis is under-secreted, it may make one articular surface rub against the thick bone of another articular surface and make a sound, which usually occurs when there is a lack of exercise or a sudden increase in exercise.

4 articular cartilage damage. Although the bones collide with each other when the joints move, there is a layer of cartilage to protect the joints. If the ligaments and joints are overstretched due to excessive exercise or incorrect posture, the articular cartilage will be damaged, which will increase the collision between bones and produce noise.