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Old 06-29-2011, 08:55 PM   #17 (permalink)
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Join Date: Jan 2010
Location: NorCal
Posts: 564

Originally Posted by cjohnson728 View Post
Yes, and apparently I didn't do it fast enough; I stopped, then started blowing again. Once I got the hang of it, it was okay, but I kept thinking I would pass out getting rid of all the air...

I still don't exactly understand the science behind it, but I trust it.
I think it's a buoyancy thing- fat floats, the less air in the lungs the more accurate the results will be.....I think
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