Author Topic: Bioimpedance analysis  (Read 2745 times)

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Coges

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Bioimpedance analysis
« on: June 15, 2014, 11:03:22 pm »
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So I'm getting my BF% tested. Last time I was tested was about 3 years ago which was done by calipers and I tested at 13%. I thought it was low at the time and they only used 4 sites to perform the test. I retested 3 months later and without any noticeable physical difference I tested at 16%.
I have spoken to someone in my area who does Bio impedance testing and they'll charge me $25 for the test and the report. I'm booked in to do it next week. I figure it'll cost at least that to get a trainer to do a caliper test and I'm not confident I know anyone who has the necessary experience to do it. Also, it's cheap enough to do again in 2-3 months to track my progress.

On reading previous threads it seems this method is not too accurate. I tried doing my own research and from what I could find it doesn't seem so bad anymore.
Has anyone else had any experience with this type of testing?
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LBSS

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Re: Bioimpedance analysis
« Reply #1 on: June 16, 2014, 10:25:06 am »
+1
isn't bioimpedance that handheld thingy? someone wants to charge you $25 to use that shit?
Muscles are nonsensical they have nothing to do with this bullshit.

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sunday: long very easy run 80+ mins @ 5:40+ (14+ km)
monday: strength/cross training
tuesday: easy run 60+ mins @ 5:20-5:30 (11+ km)
wednesday: fartlek (mostly easy pace with mix of strides, hills, long tempo) 45 mins (8+ km)
thursday: easy run 60+ mins @ 5:20-5:30 (11+ km), strength/cross-training
friday: rest
saturday: short tempo 6-8x500 @ sub-4:00 (7 km)

strength would be:
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entropy

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Re: Bioimpedance analysis
« Reply #2 on: June 16, 2014, 10:33:58 am »
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Yeah dont pay $25 for that. If you can get a DEXA for a good price (<$50) that might be worth it but i wouldn't bother with any of them personally. I'd go by mirror and tape around the waist and/or general jigglyness when you jump up and down..
Goals: Cutting to 6-8% bodyfat

Raptor

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Re: Bioimpedance analysis
« Reply #3 on: June 16, 2014, 10:45:44 am »
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Can't you just buy a weighing machine with that crap that measures lowerbody electric resistance or something? At least it would be yours and you could mess around with it at home. Yes, it will suck, but it's better than paying 25$ lol

vag

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Re: Bioimpedance analysis
« Reply #4 on: June 16, 2014, 11:23:42 am »
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There are various versions of BI-based fat measuring devices.

That handled thingy is one of them ( terrible ), scales with electrodes are another ( a little better but still not that good ), and there are some bigger badass mofo machines with multiple electrodes, those that the following article describes as "used clinically or in nutritional and medical practice", which are much more accurate.

http://en.wikipedia.org/wiki/Bioelectrical_impedance_analysis

« Last Edit: June 16, 2014, 12:06:41 pm by vag »
woot

Coges

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Re: Bioimpedance analysis
« Reply #5 on: June 16, 2014, 07:45:04 pm »
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 :-[ Haha. Ok so I'm glad I asked.

My parents actually have a set of those scales that do that so if that's just as good I'll just borrow those.

"Train as hard as possible, as often as possible, while staying as fresh as possible"
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Coges

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Re: Bioimpedance analysis
« Reply #6 on: June 17, 2014, 12:58:38 am »
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Ok so I've stolen my parent's bio scales. Just weighed myself. I've had brekky and lunch but I'll do again tomorrow morning to compare.
It has two different modes. One for athletes (10+ hours exercise a week/RHR<60) and the normal mode.
On athlete mode my bf is 11.1% (I wish) with 66% hydration level and on normal mode it's 15% with 61% hydration level. That to me would be pretty close to the mark. 
Good thing is I can use these going forward. Need to get down to 10% though. This recomp is going to prob take a few months I would think.

Thanks to everyone for warning me off paying for this type of thing.
"Train as hard as possible, as often as possible, while staying as fresh as possible"
- Zatsiorsky

vag

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Re: Bioimpedance analysis
« Reply #7 on: June 17, 2014, 05:29:46 am »
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I have one of those, obviously  you can't trust them as they seriously fluctuate depending on water. What i do is : try to have the same circumstances when measuring ( e.g. morning, after WC and before breakfast ) and also use an online bf calculator ( that waist/height/bw shit ), keep a log with both measurements and their average. Couple that with the mirror test and you have a good tool for progress evaluation.
woot

Coges

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Re: Bioimpedance analysis
« Reply #8 on: June 17, 2014, 08:37:51 am »
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I have one of those, obviously  you can't trust them as they seriously fluctuate depending on water. What i do is : try to have the same circumstances when measuring ( e.g. morning, after WC and before breakfast ) and also use an online bf calculator ( that waist/height/bw shit ), keep a log with both measurements and their average. Couple that with the mirror test and you have a good tool for progress evaluation.

Yes I noticed that it was skewed after drinking a heap of water this afternoon. I'll do the same though. First thing in morning. Btw, glad to see someone trotting out the old WC. Doesn't get mentioned too much these days  ;D

Any recommendations for the online calc?

"Train as hard as possible, as often as possible, while staying as fresh as possible"
- Zatsiorsky

vag

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Re: Bioimpedance analysis
« Reply #9 on: June 17, 2014, 05:49:58 pm »
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I think any will do, but from what I understand most people in here, including myself, use this:
http://home.fuse.net/clymer/bmi/
Probably because Kelly Baggett linked it at some article, that's where I got it from anyway...  ;D
woot

Coges

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Re: Bioimpedance analysis
« Reply #10 on: June 17, 2014, 06:59:31 pm »
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Cheers. Thanks mate.
"Train as hard as possible, as often as possible, while staying as fresh as possible"
- Zatsiorsky