It is found that when an electrical signal with a certain frequency passes through the human body, the "impedance value" of the fat part is higher than that of muscles and other tissues of the human body. When an electrical signal with a safe specific frequency passes through the human body, the electrical signal will change in different degrees due to the different "impedance values" of the human body.
Muscle contains more water such as blood, which can conduct electricity, but fat can't. Because the channel conductor of current in the body is muscle, the weight of muscle can be known from the difficulty of current passing, so it can be judged that people with less muscle have a higher proportion of fat.
The electronic fat scale uses the electrode pads on the surface of the scale to contact the user's legs, and measures the biological impedance through a certain safe current.
Then, based on the input user data and the measured human body resistance, we can accurately measure human body components, such as body fat percentage, body moisture percentage, body muscle percentage, bone weight and so on, by using the formulas we have obtained in a large number of experiments.
Normal reference range of body fat percentage:
The normal range of adult body fat rate is 20% ~ 25% for women and 15% ~ 18% for men. If the body fat rate is too high and the weight exceeds 20% of the normal value, it can be regarded as obesity. The body fat rate of athletes can be determined according to sports events. The average of male athletes is 7% ~ 15%, and the average of female athletes is 12%-25%.
To lose weight, we should pay attention to diet therapy and exercise therapy at the same time, reduce calorie intake and increase calorie consumption through exercise to achieve the effect of losing weight. Dieting to lose weight without exercise will only reduce muscle but not fat, on the contrary, it will reduce basal metabolism and easily gain weight again.