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02-08-2004, 01:08 PM
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#1 | | Senior Member
Join Date: Oct 2002
Posts: 2,999
| Cracking
When you crack you knuckles, back, neck etc. What is creating that cracking sound anyways? Someone told me it's air being released but I don't buy that. Where does the air go then right? | 
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02-08-2004, 01:28 PM
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#2 | | Senior Member
Join Date: Dec 2002 Location: New England/DC
Posts: 610
| it's air bubbles in your joints breaking | |
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02-08-2004, 01:59 PM
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#3 | | Senior Member
Join Date: Oct 2002
Posts: 2,999
| Nah....Where does the air come from and where does it go then? | |
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02-08-2004, 02:16 PM
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#4 | | Senior Member
Join Date: Aug 2003
Posts: 4,091
| Your joints contain what is called sinovial fluid, which is like grease in a mechanical joint. Nitrogen is dissolved in this fluid; when you crack your knuckles, you spread them, which decreases the pressure on the sinovial fluid, causing some of the nitrogen to come out of solution. As to where it goes...well, I'd imagine it stays out of solution, in your joint, for a short time before the joint returns to normal, and the increased pressure forces the nitrogen back into solution. That's why you can't crack your knuckles twice in a row. | |
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02-08-2004, 02:38 PM
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#5 | | Senior Member
Join Date: Mar 2003 Location: Overland Park, KS
Posts: 291
| ewww.  no matter how the joints crumble, it just sounds gross to even think of it 
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touche'!
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02-10-2004, 06:51 PM
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#6 | | Senior Member
Join Date: Nov 2003
Posts: 196
| It also has no negative effects on the body, and does not lead to arthritis. So crack away!
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02-10-2004, 10:17 PM
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#7 | | Senior Member
Join Date: Mar 2002 Location: Gulf Coast Division
Posts: 2,401
| Master, I have this bad habit. Can you site any professional opinons that prove your statement? I would hate to have my habit justified by someone who has no proof to back it up.
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02-10-2004, 11:14 PM
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#8 | | Senior Member
Join Date: Aug 2002 Location: Singapore
Posts: 366
| According to this site http://science.howstuffworks.com/question437.htm
there has only been one published study done correlating joint damage to knuckle cracking. The result is that there is no apperent relation between joint cracking and arthritis but there is evidence of other kinds of damage.
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In Deum Veritas, In Deum Caritas
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02-11-2004, 08:48 AM
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#9 | | Senior Member
Join Date: Sep 2003 Location: San Antonio
Posts: 238
| Soldiers assessment of the cause of the noise is 100% correct. Master is also correct. Although some of those with a very enthuiastic cracking style may develop mechanical problems related to hyperextension of the joint causing cartilage damage conective tissue weakening and grinding of bone on bone.
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