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  #21  
Unread 08-31-2009, 06:51 PM
PlankIt PlankIt is offline
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Quote:
Originally Posted by cycomiko View Post
No form of measurment is perfect

DEXA measurement of bodyfat is based on equations developed on people who are not you

Your body water can vary

the food in your belly can vary

teh type of dexa and/or their software can vary

teh operator can vary

the day definately varies

all of the above can influence what result comes out the other side.

even same day, same operator, same machine can have variation

woot for DEXA
Oh, I'm sorry, I should have been more specific.... I was just wondering if you could give a numerical value to "enough variability"

Thanks
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  #22  
Unread 08-31-2009, 08:22 PM
cycomiko cycomiko is offline
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fat normals - same day, same machine, same operator +- 1kg lean, +- 0.6kg fat

drinking beforehand a gain in lean

eating before hand can also reduce your BMD

excellent

as an example

Blue is the difference between two repeat measures for total mass
Pink is the difference between two repeat measures for fat mass
Yellow is the difference between two repeat measures for lean mass

1 - 8 is the subject number

The Y axis is the difference in kilograms (1kg = 2.2lbs)


Last edited by cycomiko : 08-31-2009 at 08:28 PM.
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  #23  
Unread 08-31-2009, 08:29 PM
PlankIt PlankIt is offline
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interesting......thank you
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  #24  
Unread 09-21-2009, 06:50 PM
jesse jesse is offline
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Wonder how the first link can even be considered. You can not measure BF based on the waist size alone.
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  #25  
Unread 09-21-2009, 08:09 PM
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lylemcd lylemcd is offline
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And yet it shows decent correlation with other measures.
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  #26  
Unread 09-23-2009, 05:16 AM
jesse jesse is offline
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Quote:
Originally Posted by lylemcd View Post
And yet it shows decent correlation with other measures.
I dunno depends on who you ask. For me it gives me 15% BF as I carry weight around my waist. Multi-site calipers give me 11-12%, so I would agree that it is very close.

Multi-site calipers for my wife give her 25-28%. The waist measurment gives her 17%. There is no way she is 17%.
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  #27  
Unread 09-23-2009, 08:46 AM
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lylemcd lylemcd is offline
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Quote:
Originally Posted by jesse View Post
I dunno depends on who you ask. For me it gives me 15% BF as I carry weight around my waist. Multi-site calipers give me 11-12%, so I would agree that it is very close.

Multi-site calipers for my wife give her 25-28%. The waist measurment gives her 17%. There is no way she is 17%.
Given that women carry fat differently than men, I would expect it to give more accurate results for men than women.
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  #28  
Unread 09-25-2009, 02:23 PM
scottuf scottuf is offline
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i've found this to be a fairly accurate tape measure method (at least in correlation to calipers, and when i was cat 3 to lyle's bmi correlation)
http://www.healthcentral.com/cholest...-2774-143.html
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  #29  
Unread 10-22-2009, 10:27 AM
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deerhunter98 deerhunter98 is offline
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The second link said that I was 6.42% BF. I don't think so. I will try the others out when I get a tape measure handy. Not sure what I actually am, but I am guessing around 12ish.
Does anyone have a recommendation on a descent set of calipers. I was looking at the Accu-Measure Fat Track II Digital Body Fat Caliper. Any feedback on these?
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  #30  
Unread 10-22-2009, 11:40 AM
captshiner captshiner is offline
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slim guides from creative health. stay away from anything "accu-measure"
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