What actually produces that resulting noise and feeling of relief?
, which helps give nutrients to the cartilage in your joints to help them glide smoothly. Cartilage’s main job in the body is to make sure that whenever you are moving your limbs this way and that, the movement is, and feels, smooth. That’s why it’s a key player when it comes to cracking your back.
examined MRIs of knuckles cracking and argued that the cracking actually happens when a gas-filled cavity forms as the joints stretch, not when the gas bubbles themselves collapse.Either way, having loose ligaments and tendons may play a role, too, since people who have tight ligaments and tendons typically aren't able to shift in ways that allow them to actually "crack" their back, Dr. Anand says.
For now it’s a bit of an unsolved mystery just what is happening in your body when you crack your back. But what is very well established is that it feels ridiculously good and satisfying to do it. So, the next obvious question is: Do you need to be worried about cracking your back?The good news is that cracking your back is usually pretty innocuous. “Ultimately, it doesn’t matter why this happens [as long as] it doesn’t hurt,” he adds.
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