What happens to your knuckles when you crack them?
This video explains the process, and mentioned a case report of one scientist cracking one hand and the other hand as control, with no long term sequel:
https://youtu.be/n3IYmdy6d4Y
Is this scientifically proven? Is such habit "safe" or can that lead to arthritis on the long-term?
Mohamad-Hani Temsah I worked as a hand surgeon for most of my career. I believe that many joints can make various sounds and may be annoying but not harmful. Popping from knuckles is probably caused by gases coming out of solution under pressure and exploding, causing bubbles to suddenly form. So I think the video is true. I don't think any of the sounds from joints directly leads to any form of arthritis but may lead to some transient synovitis and weakness of grip. see
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Mohamad-Hani Temsah I worked as a hand surgeon for most of my career. I believe that many joints can make various sounds and may be annoying but not harmful. Popping from knuckles is probably caused by gases coming out of solution under pressure and exploding, causing bubbles to suddenly form. So I think the video is true. I don't think any of the sounds from joints directly leads to any form of arthritis but may lead to some transient synovitis and weakness of grip. see
Article “Cracking Joints”: A bioengineering study of cavitation in t...
Article Habitual joint cracking and radiological damage
Article The Consequences of Habitual Knuckle Cracking
Article Cineradiography of a cracking joint
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