Body fat/water %

  • OptimusMatt

    Posts: 1124

    Oct 17, 2007 11:30 PM GMT
    Ok, so I have a scale that measures my body fat and my body water % - however, my body fat % fluxuates dramatically based on the water %.

    Example: at 54.9% body water, it tells me I have 21% body fat. at 57% body water, I apparently have a 16% body fat. at 60% body water, I have a 13% body fat.

    I realize that it's a range, and it's hard to be precise with scales like these, but it makes it EXCEEDINGLY difficult to set a target with achivable goals (which is a way I try and motivate myself) when I don't have a real, solid number to go by. I also realize that hydration levels should be between 50-65% in males, but is there sort of a standard 'level' that I should be aiming for? I mean, I'd love to tell myself I'm down to 13% bodyfat, but then the next day I'm up to 20%. It's very confusing.

    Can anyone clarify? Any input is appreciated.
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    Oct 17, 2007 11:51 PM GMT
    Those body fat scales send and electrical current through your body. The theory is that because fat is an insulator, the more fat you have the longer it takes for the current to pass through. This equals a higher percentage of bodyfat. If you have more water in your system the current will pass through faster because of your electrolytes (sodium/potassium) in the water. Less water = more resistance. To solve this, try to be as consistent as possible with time, hydration, etc.
    Hope this helps
    mike
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    Oct 18, 2007 12:04 AM GMT
    basically water conducts electricity so the more water you hav ein oyu the faster the current travels and miraculously the less body fat you have
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    Oct 18, 2007 12:04 AM GMT
    the only true way to find out body fat is to have yourself weighed underwater after expelling all the air from your body. this is a very expensive process
  • DiverScience

    Posts: 1426

    Oct 18, 2007 1:03 AM GMT
    My gym has water displacement tests every month or so for 50$ a pop.

    The next best thing is calipers, which won't give you an exact number but is more likely to at least give you a consistent one.
  • fryblock

    Posts: 387

    Oct 18, 2007 7:22 AM GMT
    well at the swine barn we use an ultrasound machine that measures back fat. i wonder if this works for body fat for humans...
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    Oct 19, 2007 3:46 PM GMT
    Purchase a Futrex 1000 body fat tester! It is an excellent device and will give you baseline which you can check against as you progress. I paid $100.00 for mine over 10 years ago, They are available on ebay for an exceptional price! Hurry as I see they are only 5 available!