Some data show that obesity is now one of the main factors affecting human health in the 21st century, and obese people have a greater risk of hypertension, dyslipidemia and metabolic syndrome. Obesity is usually measured by body mass index (BMI), BMI = weight (kg) / height squared (m 2), according to Chinese standards, when the BMI is greater than 24 for overweight, BMI greater than 28 for obese. However, there are people whose indicators reflecting metabolic risk factors are relatively normal despite their body fat content being greatly overweight; conversely, there are people who are only mildly overweight but may show all the symptoms of metabolic complications. For this reason, waist circumference measurement is particularly important for patients defined as overweight by BMI criteria. Even for normal weight individuals, increased waist circumference is likewise a marker of increased risk of disease, and waist circumference is a strong predictor of metabolic syndrome. According to the WHO, men with a waist circumference >102 cm and women with a waist circumference >88 cm are at increased risk for metabolic complications. The threshold of high-risk waist circumference varies among different ethnic groups, with the Chinese having a waist circumference of >85 cm for men and >80 cm for women. The increase in waist circumference leads to higher blood pressure, more fat in the body to increase the supply of blood vessels, more blood vessels after the increase in diameter, after the increase in diameter, the need for more blood flow. The heart will have to pump more blood to ensure the supply of blood, the heart to make efforts to cause hypertrophy of the heart muscle, hypertrophy to a certain extent will cause myocardial ischemia, after the increase in the amount of hypertrophy, increase the pressure caused by increased blood pressure, so after the increase in fat, will cause hypertension. The thickness of the waistline is directly proportional to the incidence of cardiovascular disease. The most important problem in cardiovascular and cerebrovascular is atherosclerosis, which is the gradual deposition of fat on the top of the arterial wall, causing atheromatous fatty plaques. If the fatty plaque is dislodged, it will soon block the blood vessels, which will lead to myocardial infarction in the heart and cerebral infarction in the brain. Waist circumference and diabetes are also proportional, the larger the waist circumference, the fatter the person, the higher the chance of getting diabetes, for example, the waist circumference of more than 85 centimeters compared to less than 85 centimeters, the disease rate is three times higher. For example, a waist circumference of more than 85 centimeters is three times higher than that of less than 85 centimeters. The health problems associated with a thick waistline are very serious, so we must pay attention.