A larger study came to a similar conclusion. For example, joint dislocations and tendon injuries have been described after attempts to crack knuckles. One study published in found that among 74 people who regularly cracked their knuckles, their average grip strength was lower and there were more instances of hand swelling than among people who did not crack their knuckles.
However, the incidence of arthritis was the same in both groups. And another study created a mathematical model of a knuckle that helped confirm that the noise comes from collapsing gas bubbles. The origin of most joint noises, such as popping sounds or cracking of the knees when squatting, is uncertain. They may come from the kneecap rubbing on the bones below, or a tendon sliding across an irregular surface.
However, in the absence of pain, swelling, or other joint symptoms, these sounds are probably nothing to be concerned about, and there is no reliable way to silence them. As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles.
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There are several publications in pub Med that point to this. I can only imagine that the strength reduction is modest at best.
Arthritis causes knuckle cracking, not the other way around. There is no medical evidence that knuckle cracking causes arthritis; not one study. If a young person had mild discomfort or stiffness in his hands, would he crack his knuckles to make them feel better? Women's Health. Expert Advice. Patient Stories. Make an Appointment. Schedule a Callback.
Call us 24 hours a day. Support Cedars-Sinai. The cracking or popping sound is thought to be caused by the gases rapidly coming out of solution, allowing the capsule to stretch a little further. The stretching of the joint is soon thereafter limited by the length of the capsule. If you take an x-ray of the joint after cracking, you can see a gas bubble inside the joint.
This gas increases the joint volume by 15 to 20 percent; it consists mostly about 80 percent of carbon dioxide. The joint cannot be cracked again until the gases have dissolved back into the synovial fluid, which explains why you cannot crack the same knuckle repeatedly.
But how can releasing such a small quantity of gas cause so much noise? There is no good answer for this question. Researchers have estimated the energy levels of the sound by using accelerometers to measure the vibrations caused during joint popping. The amounts of energy involved are very small, on the order of 0. Studies have also shown that there are two sound peaks during knuckle cracking, but the causes of these peaks are unknown. It is likely that the first sound is related to the gas dissolving out of solution, whereas the second sound is caused by the capsule reaching its length limit.
A common, related question is, Does popping a joint cause any damage? People often hear these noises in their knee and ankle joints when they stand up from sitting or while walking up or down the stairs. A popping sound in a joint such as the elbow may result from instability or looseness, the American Association of Orthopedic Surgeons points out.
A person might also find that the joint catches as they move. If the sound of a joint cracking occurs with any pain, this may indicate damage to the joint and possibly a tear in the cartilage that cushions it. Anyone experiencing this should consider contacting a healthcare professional. While a person might be concerned that this causes arthritis, several studies have concluded that any association is unlikely. One physician researched his own knuckle cracking, in response to complaints from his family.
He cracked the knuckles of his left hand at least twice a day for 50 years, but not those of his right hand. The doctor did not develop arthritis in either hand, and he reported that there were no differences between the two hands. He concluded that knuckle cracking was not linked to arthritis. Among this group, The researchers concluded that the risk of developing arthritis is roughly the same, whether or not a person cracks their knuckles.
Joint manipulation stimulates a set of nerve endings, called the Golgi tendon organs, which are involved in the sense of motion. These sit where the tendons join the muscles, and they respond to changes in muscle load. When a person cracks their joints and these nerve endings are stimulated, the person experiences a sense of release of pressure in the joints. This can also cause the muscles around the joint to feel more relaxed and the joint to feel more mobile.
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