Tag: knuckle-cracking

  • When you crack your knuckles, you’re creating bubbles

    When you crack your knuckles, you’re creating bubbles

    The next time you crack your knuckle, know that you’re actually creating little gas-filled bubbles in the fluid that lubricates your knuckle’s joints. The cavities appear because the bones at the joints separate rapidly, creating a low-pressure volume that’s filled by gas ‘pumped’ out of the higher-pressure fluid. This is what Greg¬†Kawchuk, a professor at […]