How do scales know the percentage og body fat? And what did you lose if it wasn't fat?
The body fat content (BF%) can be calculated using a number of methods. Some of them, for many, will never be available, because they require either access to specialized measuring equipment or the ability to use very complex anthropometric patterns. Of all methods that have been created and developed, from measurements of skin and muscle folds to methods using bioelectric impulses, the YMCA, which precisely determines the level of body fat in the body, is a simple and effective method. The YMCA method is simple because I use only two variables: belt circumference (waist) and body mass. Many people who do not have access to specialist fat testing equipment in the body are doomed to ignorance. And yet, the level of body fat is an indicator that can be used to record changes in the body while running a diet or a dose of increased physical activity. The percentage of body fat in the body can be calculated in the home conditions by substituting the following data for the following formula:
waist circumference (waist) - in centimeters,
body weight - calculated in kilograms.
Example:
Body weight: 80 kg
Waist circumference (waist): 100 cm
Sex: Male
Step # 1: calculate "a" a = 4.15 * waist circumference (a) a = 4.15 * 100 cm a = 415
Step 2 calculate "b" b = a / 2.54 b = 415 / 2.54 b = 163.38
Step 3 calculate "c" c = 0.082 * body weight * 2.2 c = 0.082 * 80 kg * 2.2 c = 14.43
Step 4 calculate "d" d = b - c - 98.42 (for women b - c - 76.76) d = 163.38 - 14.43 - 98.42 d = 50.53
Step 5 calculate "e" e = body weight * 2.2 e = 80 kg * 2.2 e = 176
Step 6 calculate "result" Result = d / e * 100 Result = 50.53 / 176 * 100 Result = 28.71% +/- ~ 3%
The obtained result is the percentage of fat in the body (BF%), which should be considered reliable. The accuracy of the calculated result is quite precise, and the error may be up to several percentage points (usually +/- ~ 3%). The result should be confronted with the table that can be found in the article "Physical attractiveness and body fat level". The BF% indicator can become an indicator of the physical condition and state of health for many, and can be used to monitor the course of the diet and changes in the body subjected to training reducing unnecessary fat tissue. The determination of BF% is now available to all of us