Weight Loss Support - Anybody had a bioimpedence body fat test?




geoblewis
04-22-2012, 08:31 PM
I went to a weight loss clinic in Sacramento recently and part of their initial visit was to have me stand on what looked like a fancy, high-tech scale with bicycle handles. It wasn't bike handles. The handles actually had metal on them, as well as metal where I placed my feet, to run a small current and discover what my body composition was. It's not the most accurate thing, but I didn't have to strip down or get under water.

So it said my lean body mass was 160 lbs. I figure it's pretty close. I'm almost 5'11" and I definitely have big bones. I've been working out with weights and doing Pilates for the past two years and I know that under all my fluffy layers there's muscle because I can feel it in there.

So let's just say it's totally accurate. Does that mean for an athletic woman's build, body fat around 25%, I should weigh 200 lbs? That's like 10-35 lbs more than what those weight charts tell me I should weigh.

I know that as I lose weight, if I don't keep exercising, I'll lose some of my lean mass. I'm going to keep working out because I don't really want to. I like the idea of being a strong-looking woman.


JohnP
04-22-2012, 09:09 PM
Bioimpedence is not accurate. (http://weightology.net/weightologyweekly/?page_id=218)

threenorns
04-22-2012, 09:50 PM
bioimpedence, in my case, is a disaster. i tested myself 5x and got readings +/- 10%, which is a heck of a margin of error.

the only accurate way to test your body fat is the dunk tank - it's expensive, difficult to access, and kinda scary.

http://www.bodyfattest.com/


geoblewis
04-23-2012, 01:38 AM
Hey! Thanks for the links!

I knew it wasn't accurate, but it made me think about how much of the LBM I was going to still lose even though I'm pumping weights and doing Pilates. Even if it was 10% off (144 lbs) and I add to that 22% body fat, that puts me at about 176 lbs for goal weight.

I guess I'll worry about my actual body fat % percentage when I break below 200 lbs. That's when I'm going to track down that truck and get dunked!

JohnP
04-23-2012, 03:38 AM
I guess I'll worry about my actual body fat % percentage when I break below 200 lbs. That's when I'm going to track down that truck and get dunked!

Great plan.

pnkrckpixikat
04-23-2012, 05:11 PM
no matter what you do you will still lose some lean body mass as you go so dont try to use your current as a gauge for your goal body weight

shcirerf
04-23-2012, 07:52 PM
A few years ago, I worked for a telecom company, we manufactured, telecom wire. Impedence, was a big deal. I ran a big cable line that manufactured, 100 pair wire. The machine was as long as a football field, let's load 100 reels of 2 pair wire, and let her rip, onto a take up, that quartered the wire into 4 groups of 25 pair.

I can't even imagine how impedence would have anything to do with weight/fat loss and fitness.

While it does have certain scientific applications, with weight loss and fitness, it would be the last thing I would concern myself with. :D

ValRock
04-23-2012, 08:18 PM
Yup, that stuff is just not accurate.

I had mine taken when I was around 250. They told me my lean mass was 183... clearly not so. I'm not burning organs yet ;).

Elladorine
04-23-2012, 10:46 PM
the only accurate way to test your body fat is the dunk tank - it's expensive, difficult to access, and kinda scary.
Out of curiosity, about how expensive are those kinds of tests?

threenorns
04-23-2012, 10:55 PM
the best guess i could find online was a couple hundred dollars.

there's another method being touted that i've never heard of, called DEXA, that's cheaper.

juliana77
04-23-2012, 11:02 PM
the best guess i could find online was a couple hundred dollars.

there's another method being touted that i've never heard of, called DEXA, that's cheaper.

Found hydrostatic locally for $60 (googled my city and body fat testing). I think I might try it. They also do RMR testing (resting metabolic rate) for $75

JohnP
04-24-2012, 12:28 AM
I did a hydrostatic weight test for $50. It still has a decent margin of error. DEXA scan is the most accurate.

ennay
04-24-2012, 02:01 AM
Honestly I found the naval circumference as good an estimate as bio impedance. Not for raw number per se, but for change in composition. Less prone to fluctuations due to water weight, humidity, how long since I pooped, etc.

For awhile I tracked hand held bio, foot bio, and found that I could predict when I was going to see a drop in water weight by the difference between them.