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  #31  
Unread 11-14-2009, 09:22 AM
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fluteangel fluteangel is offline
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Quote:
Originally Posted by lylemcd View Post
For those who want a non-caliper method for estimating bodyfat percentage (that's not the BMI method in Rapid Fat Loss or A Guide to Flexible Dieting).

Surprising to me the first and second gave me reasonably decent estimates. I don't remember if I tried the third.

http://www.freeweightloss.com/calculator1.html

http://www.he.net/~zone/prothd2.html

http://www.linear-software.com/online.html
The first one told me I'm at 20%, the second didn't work and the third told me I'm at 27%. I'm trying to calculate my bf% for RFL and all I have to go on are tape measurements and my Tanita scale. It says 25% in the morning after I pee and in the evening before I go to bed 23%. Which would be a safer number to go with for determining protein intake?

I'm 29, 5'3", 123.8 lbs (yesterday), 27" waist, and unfortunately, don't have any pictures recently to post up to help.

Any idea? Would it be safer to err on the higher side to prevent losing muscle?

Last edited by fluteangel : 11-14-2009 at 09:28 AM.
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  #32  
Unread 11-14-2009, 09:29 AM
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lylemcd lylemcd is offline
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I think if you sit down and work through teh recommendations based on those different BF%ages at your weight, the difference in protein recs will amount to maybe 10-15 grams of protein.

To white: if you calcaulte nean body mass at 23% vs. 27% at your weight it ranges from 98-103 lbs and when you multiply that by the protein values, the difference in daily intake adds up to 3/5ths of it doesn't matter.
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  #33  
Unread 11-14-2009, 10:36 PM
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fluteangel fluteangel is offline
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Quote:
Originally Posted by lylemcd View Post
I think if you sit down and work through teh recommendations based on those different BF%ages at your weight, the difference in protein recs will amount to maybe 10-15 grams of protein.

To white: if you calcaulte nean body mass at 23% vs. 27% at your weight it ranges from 98-103 lbs and when you multiply that by the protein values, the difference in daily intake adds up to 3/5ths of it doesn't matter.
I put in both on the RFL calculator actually and the difference between 23 and 25% on those was what shocked me. At 23% it calculated I needed 191g protein and at 25% it said 116. That seems like a huge difference to me.
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  #34  
Unread 11-15-2009, 10:17 AM
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lylemcd lylemcd is offline
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That's because your changed categories.
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  #35  
Unread 06-04-2010, 09:04 PM
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Ok according to the first link I have 18% bodyfat and according to the third I have 30% WTF!!! I've been on RFL for a week thinking I had 30%. I'm 5'7, 165.5 lbs, wear a size 8 or 10 and lift heavy3-4 days a week. Can someone shed some light on this?
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  #36  
Unread 06-04-2010, 09:25 PM
BillRempel BillRempel is offline
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Quote:
Originally Posted by laylee View Post
Ok according to the first link I have 18% bodyfat and according to the third I have 30% WTF!!! I've been on RFL for a week thinking I had 30%. I'm 5'7, 165.5 lbs, wear a size 8 or 10 and lift heavy3-4 days a week. Can someone shed some light on this?
(1) They use calculations based on a survey of people in order to estimate bodyfat. Perhaps your body deviates from that large survey group's average enough to make one set of those calculators inaccurate, i.e. a formula mismatch?

(2) More likely IMO is that an improper measurement technique was used on one of those.

Read this and look at the table at the bottom: http://www.bodyrecomposition.com/fat...n-numbers.html Female at 18% BF is looking lean as a natural bodybuilder off-season, lean legs, about where someone looks at her and says they look "in shape." It's also at the BOTTOM end of what's recommended for health. So probably the error is on the first link (formula mismatch or measurement error).
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  #37  
Unread 06-04-2010, 09:25 PM
PlankIt PlankIt is offline
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Quote:
Originally Posted by laylee View Post
Ok according to the first link I have 18% bodyfat and according to the third I have 30% WTF!!! I've been on RFL for a week thinking I had 30%. I'm 5'7, 165.5 lbs, wear a size 8 or 10 and lift heavy3-4 days a week. Can someone shed some light on this?
post a picture in the bf% thread
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  #38  
Unread 06-07-2010, 11:30 AM
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JamesKrieger JamesKrieger is offline
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In relation to this thread, I just posted a couple articles on body fat testing and its inaccuracy. They are the first two parts of a multipart series.

Part 1...Body fat testing is a prediction, not a measurement
Part 2...Hydrostatic weighing a gold standard? More like bronze standard

Anyway, Lyle is dead-on when he talks about not using estimation equations for calculating body fat %. There's too many assumptions and too much inaccuracy to make them reliable for looking at body fat in individuals, although they work fine for populations.

The best thing is to simply take the skinfolds and circumference measurements. If they're going down over time, you're losing fat.
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  #39  
Unread 06-09-2010, 04:24 PM
Steve Van Nort Steve Van Nort is offline
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Quote:
Originally Posted by lylemcd View Post
For those who want a non-caliper method for estimating bodyfat percentage (that's not the BMI method in Rapid Fat Loss or A Guide to Flexible Dieting).

Surprising to me the first and second gave me reasonably decent estimates. I don't remember if I tried the third.

http://www.freeweightloss.com/calculator1.html

http://www.he.net/~zone/prothd2.html

http://www.linear-software.com/online.html
Second link is outdated. FYI~
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  #40  
Unread 07-18-2010, 03:51 AM
springbody springbody is offline
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Slightly different combination of sites for untrained female to guess their bf

http://www.bmi-calculator.net/body-fat-calculator/
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