What makes the sound when your back cracks while stretching, and why can’t the sound be made again until later when it needs to be cracked again?

Question

What makes the sound when your back cracks while stretching, and why can’t the sound be made again until later when it needs to be cracked again?

In: Biology

Answer 1

In each joint there are gasses. These gasses can get released when the joint gaps. It’s nitrogen gas that gets released. The joint doesn’t fill up with gas again until 30-60min after you “crack” it