The principle of body fat scale is that the body fat rate is indirectly calculated, or estimated, rather than directly measured as weight, which fundamentally leads to errors. In fact, as long as the error is within a reasonable range, it will not affect the normal use at all, because we should pay attention to the physical changes over a period of time.
The body of the body fat scale sends a weak current to the human body through the electrode plate, and the micro current enters the human body from one foot, and after conducting in the body, the data is transmitted back to the electrode plate of the other foot. The human body and body form have a closed AC circuit to obtain an electrical impedance value, and then the body fat rate is calculated by combining the electrical impedance value with the data such as height and weight.
Because the data of the body fat scale is calculated based on the resistance value and the human model, there are naturally errors, and it is also affected by factors such as human moisture and conductivity, so it is of little significance to inspect the accuracy of the body fat scale.
Matters needing attention in the use of body fat scale
1, if wearing shoes or socks, standing on the weighing scale can also measure body fat, it means that weighing scale will not emit electricity at all. The real body fat scale can't measure the body fat rate through shoes, socks or plastic bags.
2. Real body fat scale, whether feet are wet or not will also lead to abnormal resistance during measurement, which will lead to a sudden change in body fat rate.
3. The body fat rate measured by normal body fat scale will change greatly in the morning and evening.
In the morning, before eating and drinking, the body fat rate reached the peak of the day, and in the afternoon and evening, with the increase of weight and water rate caused by eating and drinking, the body fat rate reached the lowest value of the day. So within a day, even if the weight is the same, the body fat rate will fluctuate, which is not a fixed data.