5 common body fat meter rate detection methods
1. BMI formula method
Body fat rate=(1.20×BMI)+(0.23×age)-(10.8×sex)-5.4
When the gender is male, the gender value is 1, and when it is female, the gender value is 0. Knowing your weight and height, you can estimate the fat percentage.
2. Sebum forceps measurement method
When using sebum forceps, pinch and lift the skin of the measured area with the thumb and index finger of your left hand. Then insert the opened sebum forceps from 1 cm away from the pinched part of the fingers. Read the value of the pointer and record it. Then calculate your own body fat rate according to the corresponding formula.
3. BIA measurement method
Basically, home and gym body fat meters use this method for measurement. Its principle is to use the characteristics of muscles as a good conductor and fat as an insulator, to emit current to the human body through different electrodes, and then to measure the resistance of the human body, and then substitute the test results into an equation containing height, weight, gender, and age to calculate the human body Fat content and ratio.
The cheapest body fat meter online only costs about 100 yuan. But the biggest disadvantage of this method is that if there is metal on the body, it will interfere with the resistance measurement result, so you can’t wear any jewelry or watches, and you can’t wear clothes with metal zippers.
4. DEXA measurement method
There are many such methods, including density method, dual-energy X-ray absorption method, tomography and nuclear magnetic resonance method, etc., but these measurement methods all require high-end instruments. Two beams of X-rays, one strong and one weak, pass through the subject’s body, and the subject’s body fat content is obtained based on these data.
5. Underwater weighing
Remember the story of Archimedes? He put the crown and the same weight of gold into two containers filled with water. If the overflowing water is the same, it means that they have the same density and the same substance. If the overflowing water is different, it means that the crown is dropped. This is the same principle as underwater weighing.
But the underwater weighing operation is extremely complicated. It requires the subject to weigh on the ground and underwater, and then compare the two weight values. Because more fat is more buoyant, the body weight will be lighter under water. The formula can be used to know the fat content from the weight difference. Finally, repeat the measurement several times to get a relatively accurate mean value.