Any movement that stresses your joints can result in popping and cracking sounds. Lifting weights often causes the shoulder joints to make these noises. There is no definitive answer as to why this happens, according toJohns Hopkins Medicine's Orthopaedic Surgeryunit, though two theories have been proposed.
The buildup and release of gases in the synovial fluid around your joints is suspected to cause popping. The slip of tendons across joints has also been suggested as the cause of cracking sounds. Joint-cracking without pain is not typically indicative of a medical problem.
小费
关节中的弹出和开裂声音可能会令人不安，更不用说令人惊讶。如果声音交响乐没有过度疼痛，那么通常没有什么可担心的。
Gases That Cause Cracking Sounds
Synovial fluid — the substance that lubricates your joints — is composed of oxygen, carbon dioxide and nitrogen. These gases can bubble out of the synovial fluid when negative pressure is applied to a joint, such as when you lift weights.
A pop or crack can result from the escape of these gases as demonstrated in X-rays, according to the scientific facts pages of the国会图书馆. Once the gases are reabsorbed into the synovial fluid, they can again be expelled, creating more cracking sounds.
关节的动作
The action of the joints used in lifting weights might contribute to the cracking sounds you hear. Tendons or ligaments might be slipping in and out of place as you move your shoulders, similar to the twang of a rubber band bowstring.
Eroded bone and stressed supportive joint tissues can increase the likelihood of cracking sounds while moving your shoulders beyond their normal range of motion, such as over your head, while you raise heavy weights.
Read more:How to Improve Joint Strength
Other Contributing Factors
说，年龄是一个贡献因素，更加开裂和爆震声音克利夫兰诊所. Your cartilage has been wearing away for years, the surfaces get rough, and hey presto, you hear more cracking noises.
If you have osteoarthritis — which often results in worn-down or roughened joint and cartilage surfaces — you might experience more cracking while lifting weights than people without this underlying condition.
如果裂纹噪声伴随着疼痛，可能会在受影响的关节中减少灵活性或弱点，您可能会经历联合问题。如果出现任何这些症状，请咨询您的医生。
What Does It All Mean?
Joint-cracking is usually harmless, and, contrary to popular belief, has never been proven to cause or exacerbate arthritis in that joint, although it may lead to minor swelling in the hands and a weakening of your grip.
If you don't feel pain during the cracking sounds resulting from lifting weights, you probably have nothing to worry about. A gentle stretch of the joint that's cracking or snapping during weightlifting could make the sound diminish or disappear.