Snap, Crackle, Pop!
KNUCKLE POPPING Yes, I do it! The popping sound that knuckles make when you crack them is caused by the sudden release of gas bubbles in the synovial fluid that surrounds the joints. Synovial fluid is a thick, clear liquid that helps to lubricate joints and reduce friction. It also contains dissolved gases, such as nitrogen, oxygen, and carbon dioxide. When you crack your knuckles, you are stretching the joint capsule that surrounds the joint. This causes the pressure in the synovial fluid to decrease, which allows the dissolved gases to come out of solution. As the gases bubble out, they create a popping sound. The popping sound is harmless, but it is important to note that cracking your knuckles too often can weaken the ligaments that support the joints. This can lead to joint pain and instability. Here are some additional facts about knuckle cracking: * The sound of a knuckle crack can be as loud as 90 decibels, which is about as loud as a vacuum cleaner. * The average person ...