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What happens to the knuckles to make them crack or pop?
What happens is you release a small bit of nitrogen into your blood stream. it isn't harmful but dont do it to the extreme.. because that can be dangerous
They used to say that cracking your knuckles would give you arthritis. A doctor friend of mine says that that is not true; that "popping" your knuckles is just releasing gasses in the joints....
It is suggested that you will get arthritis/bad joints but this may or may not be true. Having had a joint (elbow, knee) that will not move right, and had to "crack" it to get full mobility back, I...
Your knuckle joints are moved, releasing small bubbles of Nitrogen which creates the small popping sounds. It is not dangerous to do this, but if practiced to the extreme, your fingers will not bend...