How do body fat scales work. Skinfold calipers measure the thickness of your subcutaneous fat the fat underneath the skin at certain body locations. Since the electrical current flows more quickly through water and muscle than bone or fat the scale measures the speed of the current. No body fat test be it body fat percentage scales dexa or skinfold calipers can accurately measure how much fat you have. The only way to measure your body fat is to have it stripped out placed on a scale and weighed. The term body composition refers to the relative percentages of fat muscle and water.
That is to say they send a safe and very low electrical current through the lower half of the body. Body fat scales are devices that a person can use to measure their weight and body composition at home. Measuring body fat percentage is a better indicator of how well your diet and exercise program is working. Available in countless models body fat scales use a technology called bioelectrical impedance to estimate how much body fat you have. Bioelectrical impedance analysis has been added to traditional bathroom scales. Body fat percentage data can be helpful at the beginning of a weight loss journey says dr.
For example a 140 pound 5 foot 6 inch person has a bmi of 226 140 divided by 66. Measurements are taken at either 3 or 7 different sites on the body. Dual energy x ray absorptiometry dexa scans. When you step on sensors on the scale an imperceptible electrical current passes up one leg across the pelvis and then down the other leg. Heinberg but its best not to get caught up in trying to measure every day fluctuations. To calculate your bmi divide your weight in pounds by your height in inches squared.
Measuring your waistline can help complement your body fat scale results. Although a scale is a useful tool in measuring weight loss it is limited to evaluating only one component. Most of these types of scales use bioelectrical impedance. When it comes to health risks related to being overweight fat is the culprit. The scales send a harmless electrical current up through your body to read the amount. Then multiply by 703.
Other ways to measure body fat waist measurements. Often used by fitness professionals calipers are used to literally pinch your skin folds usually around the.