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moobrack
Black Belt
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Joined: 09 Aug 2001
Posts: 1167
Location: Leeds

PostPosted: Sun Dec 16, 2001 9:47 am    Post subject: Reply with quote

Does knuckle crackoing lead in the long term to arthritis?

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Jack
Black Belt
Black Belt

Joined: 22 Jun 2001
Posts: 1591
Location: England

PostPosted: Sun Dec 16, 2001 10:03 am    Post subject: Reply with quote

I sure hope not. In the last 2 months my knuckles are starting to be able to crack when I press on them. I would really like to know the answer to this question too, please.
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SaiFightsMS
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Joined: 28 Oct 2001
Posts: 6397
Location: Ohio
Styles: Shotokan, Shorin Ryu, Shi-to Ryu

PostPosted: Mon Dec 17, 2001 7:06 am    Post subject: Reply with quote

The sound made during knuckle cracking is the release of air bubbles in the synovial fluid around the joints.
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Jack
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Joined: 22 Jun 2001
Posts: 1591
Location: England

PostPosted: Mon Dec 17, 2001 7:59 am    Post subject: Reply with quote

Thanks for letting us know Sai
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TKD_McGee
Purple Belt
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Joined: 02 Oct 2001
Posts: 594
Location: Washington

PostPosted: Mon Dec 17, 2001 8:28 am    Post subject: Reply with quote

Heh, I cracked my nuckle once by puching someone in the teeth.

A teeth punch is the dumbest thing u can do.

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KickChick
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Joined: 02 Aug 2001
Posts: 3282


PostPosted: Mon Dec 17, 2001 8:43 am    Post subject: Reply with quote

Normally there is a bubble of air between joint surfaces so they do not rub each other. If the muscles crossing the joint are overly tensed this air bubble is squeezed out from between the joint surfaces and a vacuum forms in its place. The cracking sound is caused by air rushing in to fill this vacuum in a joint moved past its usual range of motion. Popping and cracking of joints is not harmful per se but may indicate some(perhaps excessive) tension of the muscles surrounding these joints.
Another cause of sounds in a joint is osteoarthritis. When joint surfaces are diseased and the cartilage is eaten away, the ligaments and tendons crossing the joint get slack. Their slack lets them move in and out of their grooves, making popping sounds.
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