Question about Detecto 253 Baby Scale Mechanical Infant Scale

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Digital scale question

How do digital scales calculate body fat?

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Digital scales purport to measure your body fat through a process called BIA, or bioelectrical impedance analysis. Essentially, it clocks the speed that electricity travels through you. The scale runs a low-level electric current through your body, using your feet as positive and negative electrodes. The current encounters different levels of impedance, or resistance, from fat versus muscle. The scale measures this impedance, and throws it together with other factors (age, sex, height) to come up with your BMI, or body mass index.

Posted on Aug 27, 2008

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In fact, every day looking at known words, will be very anxious, as well as a Monday times, so there is a sense of achievement
I think to lose weight on their own, is necessary for the movement.
Believe in yourself.

Posted on Jul 27, 2011

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SOURCE: body fat scale Question

Like all body fat tests, body fat scales don't actually measure your body fat percentage. They determine your body density. The examiner (or the scales) then uses a formula to calculate body fat percentage based on body density. These formulas just predict your body fat. Unfortunately there is no one formula that accurately predicts body fat for the whole population. Differences in age, gender, ethnicity, body size, and fitness level all have a significant affect on the results. Well, whether body fat scales measure your "true" body fat percentage or not doesn't matter! As long as they can accurately monitor changes in your body composition over time, that's all you need.

Posted on Aug 27, 2008

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Unfortunately, it's the scale, but it's not broken. It simply is telling you inaccurate information.
Some scales utilize Bioelectrical Impedance Analysis (BIA) technology. BIA uses very low levels of electrical impulses running from one metal contact point/lead to another. Your body acts as the connector between the two contact points, thus completing the circuit. Not all scales use this means for calculating body fat percentage due to poor reliability and high fabrication costs.This method of measurement requires very large contact points, as well as clean and moist skin exposure. If you have dry/calluced feet, which is normal for most Americans, the sensors can not accurately measure due to skin resistance. Dry skin acts as a resistor to electrical impulse. Electricity passes through muscle and fat at different rates. However, its measurements may be thrown off by how hydrated you are and how much you've eaten; it may be too inaccurate for anything other than comparative use. Users are encouraged to establish a baseline measurement and repeat measurements under consistent conditions over time to detect changes.
Many less expensive models simply use a body-fat calculator to average your imputed height in inches, waist measurement in inches and the current weight measurement recorded in lbs. The scale compares your measurement with the ideal norms inputed during the manufactoring process, thus giving you a comparison vs.imputed norms. People who are very, very fit can get numbers 3 to 5 percent higher than their true percent body fat. Because they don't have a lot of fat inside their muscles(visceral fat), the simple tape measure calculation test cannot adjust as it should indicate.
Conversely, if a person is skinny but not fit, this body fat test may yield a number 3 to 5 percent lower than his or her true percent body fat. Though they look thin, unfit skinny people really have more than the usual amount of fat inside their muscles, which you can't see from the outside.
In either case, the scale is not necessary a measurement tool, due to high variables of test inaccuracy and interuser reliabilty; but, it is a good tool for comparing whether or not you are gaining/losing body fat.
If you would like a more accurate tool for simply measuring your body fat, you can pick up some pinch-calipers online for about the price of a scale. They come with an instructional pamphlet, very easy to use.

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