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David Clarke
04-03-1997, 09:23 AM
Dear biomch-l readers:

The following is for my own interest. I frequently "crack" my knuckles,
knees, ankles, elbows, etc. The "school-yard" explanation that I've
heard is that I'm releasing nitrogen gas from the blood. Any truth to
that? Does anyone know the mechanism behind this?

Incidently, I find that if I don't "crack" my knees frequently (4 or more
times per hour), then I find flexion/extension to be a very odd
sensation. Not painful, just a little stiff.

Can I develop arthritus year from now because I continue to do this to my
body? I've heard both yes and no.

Any insight would be appreciated.

Thanks,
David Clarke
Engineering Student
Memorial University of Newfoundland
St. John's, NF
Canada