Because the technical route adopted is different. Physiometers and household health scales are widely used in gymnasiums, and bioelectrical impedance analysis is used. The principle is that the bioelectrical impedance values of different tissues in human body are different.
The specific process is that 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 then transmits the data back to the electrode plate of the other foot after being conducted in the body.
The human body and weighing scale form a closed AC circuit, so an electrical impedance value is obtained, and then the body fat rate is calculated by combining the electrical impedance value with the data such as height and weight.
However, the accuracy of measuring instruments and measuring operation methods will affect the measurement results. Household health scales usually stand on the induction patch with only two feet, and most of the test instruments in the gym need to hold the test handle with both hands.
There are too many interference factors in this test, such as the size of the foot-hand contact surface and the size of the induction patch, whether you have eaten or exercised before the test, whether you have not excreted urine or dehydrated.
In addition, even the results measured by one person on two different instruments may be quite different, because different standards and calculation formulas may be adopted.
Extended data:
Experts suggest that in order to obtain more accurate body fat percentage values, we can go to specialized institutions, such as hospitals, and use CT and MR measuring instruments to accurately analyze muscle, bone density and fat distribution.
Ge Qian, a professor at Zheng Da Hospital, suggested that to control body fat at ordinary times, it is necessary to exercise more and improve the metabolic rate. Control the calories in your diet and avoid eating high-calorie foods.
Increase dietary fiber components in the diet to improve satiety; Maintain a good lifestyle, adjust exercise and diet on time, and seek help from professional medical institutions when necessary.
People's Network-Want to keep fit and lose fat? Your body fat percentage may not be accurate at all.