Body fat is the fat content of the body, both subcutaneous and visceral. Medically, body fat can be measured by skinfold thickness measurement, bioelectrical impedance, dual-energy x-ray analysis, and underwater weighing.
1. Skinfold thickness measurement: The skinfold calipers are used to measure the thickness of subcutaneous fat by clamping the skinfold to be measured, so as to estimate the whole body fat content, but this method will produce certain errors due to operational problems.
2. Bioelectrical electrical impedance: The electrical conductivity of the human body reflects the water content of the body, and the water content of fat and muscle is different, and the size of the resistance during measurement is also different. According to the size of the impedance of the human body conductivity can reflect the body fat content.
3. Dual-energy x-ray analysis method: this technology can be based on different densities of tissue photon energy attenuation degree of how much to calculate the amount of body fat.
4. Underwater weighing method: According to the law of buoyancy, the volume of the body can be measured, and then calculate the density of the body, according to the density of the body can estimate the amount of body fat.
If the body fat rate is abnormal, attention should be paid to diet to maintain a healthy body fat, if it is difficult to improve, it is recommended to consult a doctor in time.