"::darkshadows::" <blood@thirsty.net> wrote in
news:4ju8441i0b95ptgqr885th5kk1bh0vitfe@4ax.com:
>
>
> Why do body joints make popping sounds?
>
>
> Do a deep knee bend, and it's very likely you'll hear popping sounds
> coming from your knee joints. There are also popping sounds when you
> "crack your knuckles."
>
> What causes the popping sounds? Actually, two separate and distinct
> sources are responsible for the familiar popping sounds our joints
> emit.
>
> The sound heard when our knuckles crack, results when a finger joint
> is extended almost to the end of its range. The joint, surrounded by a
> lubricating fluid, is encased in a capsule. At times, we
> intentionally, or unintentionally, extend the joint so far that the
> gas dissolved in the fluid spontaneously separates from the solution,
> forming a small bubble, and making a cracking sound. Not until the
> fluid reabsorbs the gas can the sound be reproduced. Whether or not
> there is truth to the old wives tale, that cracking ones knuckles
> enlarges them, remains open to debate.
>
> On the other hand, the sound produced when we do deep-knee bends, is a
> snapping sound, produced when our tendons, which are merely the fibers
> that connect muscles and bones, elastically snap into new positions as
> our joints move under stress. Because the tendons shift back and forth
> with the movement of the joint, there is no waiting time before this
> snapping sound can be reproduced.
>
OH and I thought it was age LOL
Mercury.
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