CrossFit Discussion Board  

Go Back   CrossFit Discussion Board > CrossFit Forum > Nutrition
CrossFit Home Forum Site Rules CrossFit FAQ Search Today's Posts Mark Forums Read

Nutrition Diet, supplements, weightloss, health & longevity

Thread Tools
Old 01-03-2006, 05:41 AM   #1
Peter Borden
Member Peter Borden is offline
Join Date: Jul 2005
Location: Far Hills  NJ
Posts: 41
The problem: the Zone tape-measure system shows my body fat to be around 12-13%, while calipers are showing 5% (to 8%). Which are more accurate, to be trusted, and why? My assumption would be that calipers are better...

I know this has come up before, and I totally agree with those who preach "just use the same method throughout your training and you'll be fine." However, if I am 5-8% and not 13%, this makes a big difference in terms of zone fat blocks, and could account for me feeling energy sapped and generally ****ty as of late.
  Reply With Quote
Old 01-03-2006, 10:14 AM   #2
Jonathon Edward
Member Jonathon Edward is offline
Join Date: Dec 2005
Location: Orlando  FL
Posts: 288

When using the calipers, how many sites are you testing? A few of the calipers on the market have you only testing one spot - the iliac crest - and I don't think this is very accurate. The difference in your physical appearance from 5%-13% would be phenomenal. If your abs are very defined you're probably in the lower range (an informal but fairly accurate way to judge). Either way, try upping your fat blocks and see how you feel. If your performance increases, you feel better, and you do not gain bodyfat than go with it. Remember that customizing the Zone is as much an art as a science.
  Reply With Quote
Old 01-03-2006, 02:20 PM   #3
paul arestan
Departed paul arestan is offline
Join Date: Jan 1970
Posts: 101
Calipers shouldn't be used to estimate body composition; they can only be used to monitor changes. If the sum of all the skinflods goes down, you lose fat. Simple.
We did an experiment once: we took 6 measurements with a caliper and used the results with 3 or 4 different calculation methods. I ranged between 6 and 12% body fat, which was not accurate enough.
If you take the measurements in a consistant manner, at the exact same spots, in the same conditions, you can add them up and use the sum of all skinfolds as a guideline to see how your body composition is changing.
I don't know about the Zone tape measure and can't comment on it, but keep in mind that a test has to be appropriate, accurate, reliable and consistant to be worth using.
  Reply With Quote
Old 01-03-2006, 04:50 PM   #4
Frank Menendez
Member Frank Menendez is offline
Join Date: Dec 2005
Location: Miami  Florida
Posts: 810
How do i measure using the "Zone tape-measure system"? Link?
  Reply With Quote
Old 01-05-2006, 01:51 PM   #5
Paul Symes
Member Paul Symes is offline
Join Date: Aug 2004
Location: London  Croydon
Posts: 299
Here you go Frank

Go to resources and then click on calculator, you need to know your wrist measurement too
  Reply With Quote
Old 01-05-2006, 05:54 PM   #6
Norm Rager
Affiliate Norm Rager is offline
Join Date: Nov 2005
Location: Grass Valley/Nevada City  Ca
Posts: 87
Ditto Paul,

all methods are most relevant as a comparision, unless you really want to know within 'x' accuracy.

We usually perfomed a hydrostatic test on those that really wanted/needed to know with 'one-time' accuracy. In most cases, the curious didn't come back for a second 'dunking'.

If you enjoy expelling every possible bubble of air in your lungs, underwater, holding that until some goofball says 'okay':angry: - go for it! Look up a ExPhys dept. at a college and volunteer. Just don't gasp until your head is above water!
  Reply With Quote
Old 01-05-2006, 09:16 PM   #7
Matthew Townsend
Member Matthew Townsend is offline
Matthew Townsend's Avatar
Join Date: May 2005
Location: Melbourne  Victoria
Posts: 278
Peter how visible are your abs? I understand that if they show as a ripple, you'd be closer to the 5 to 8 mark, if you can't make them out you'd be over 10.
  Reply With Quote
Old 01-08-2006, 08:15 AM   #8
Craig Van De Walker
Member Craig Van De Walker is offline
Join Date: May 2005
Location: Beaverton  OR
Posts: 872
A seven site skin fold while not the gold standard, should be pretty accurate for most people. I have been involved in a couple of studies comparing fat measurement testing between skin fold, hydrostatic weighing, and a device called a "bod pod" (full body plethysmographig testing device). They all were within 1-2% of each other for all persons tested.

Measuring the circumference of your wrist, neck, waist etc is not going to be a very accurate guage. Nor is measuring a single skin fold site.

PS don't get some bozo at the fitness center to do it, unless they are experienced. I saw a "trainer" taking skin folds through a person's clothing??? Yes, she was actually pinching and measuring the thickness of the clothing and including it with the fold measure.
  Reply With Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Accuracy for Fitday w/ the Zone Tom Ellison Nutrition 1 05-30-2007 10:12 AM
Calipers vs. body fat scale Nick Kirkes Fitness 3 05-12-2006 10:47 AM
Recommendations on inexpensive calipers? Kevin McKay Equipment 4 03-07-2006 02:47 PM
Treadmill accuracy John Elstad Equipment 5 03-04-2006 09:43 PM
Accu-measure bodyfat calipers Brendan Melville Equipment 2 06-28-2005 03:13 AM

All times are GMT -7. The time now is 10:20 PM.

CrossFit is a registered trademark of CrossFit Inc.