Do you like to crack your fingers and other joints? Whether by reflex, by habit or to relax, there is inevitably a question that you have already asked yourself: What happens when you crack its joints, and is it bad? for health ?
First, you should know that all the joints in your body are provided with a kind of natural lubricant, called synovial fluid, which allows the bones to move without rubbing against each other (much like the fat that put in the gears, on the bike chains or in the door handles to promote movement, finally you see).
But when you stretch your joints, you produce gas that forms small bubbles in this liquid. And these little bubbles burst if you manage to trap them between two bones, which produces the famous characteristic sound. To crack a phalanx again, you will then have to wait about 20 minutes for the gas to reform into bubbles.
He cracked his fingers. @ Vox
Some crunches on the other hand, for example when you are a little “rusty”, get up quickly and your knees crack, or when you crack your back to stretch, are different. There, it is rather the slamming of the tendons which are relaxed with a sharp blow, and which come to strike on the bones or the muscles. In this case, you can repeat the action immediately after without having to wait for the gas to reform.
He cracked his fingers on one hand and not the other for 60 years.
But back to the original subject: Is it dangerous to crack his fingers?
Well, probably not. Donald Unger, an American doctor, wanted to be clear: To advance science and close the debate once and for all, he has cracked the fingers of one of his hands for 60 years, never touching to the other hand . The rash doctor wanted to see if he was going to get arthritis, as his mum and popular belief would say, or if it was vast humbiteries resulting from a campaign of propaganda and misinformation of the committee anti-cracking fingers .
However, there is always a possibility that it is not very good: According to a study published in 1990, breaking its joints over a long period could lead to slight swelling of the joints, which could decrease a little the grip strength of the fingers … But there has not yet been other research to confirm or invalidate this hypothesis.