Weight loss is a social topic, and paying attention to weight changes has become a part of many people’s daily lives. But it is also in this environment that some people who are not obese also participate in the weight loss army, bent on the pursuit of weight loss. It is important to know that the right amount of fat can play a protective role for the body, so that many life activities can be carried out normally, too light weight is harmful to the body. Moreover, weight is not a criterion for determining fat. The World Health Organization (WHO) determines overweight and obesity by the accumulation of fat as a measure, but in most cases, weight can reflect the amount of fat in the body to some extent. But there are many cases does not apply, for example, a 150cm person weighing 65kg is certainly more fat than a 180cm person weighing 75kg. There are also some athletes, because of muscle development, weight than normal people, which can not be said that people are fat it. So the determination of obesity is not only to see the weight, but to see the body fat content. Body fat content comparison table For the time being, the more accurate way to determine obesity is to do the fat degree measurement. The two ends of the calipers are used to hold the specific parts of the body, men usually measure the abdomen and back, women mainly focus on the lower abdomen and buttocks. After the measurement reaches about 2.5cm is mild obesity, 10cm or more is severe obesity. However, because this method requires the use of professional equipment, in daily life is not very practical, so the use is also relatively small. There is a more popular standard to determine obesity is to use the body mass index (BMI), the calculation method is height divided by the square of weight. For example, if a person is 1.7m tall and weighs 70kg, his BMI is 70/1.72=24.2. Because of the difference in body size and physical condition between Asians and Westerners, the criteria for determining obesity are also different. Here is a comparison table of the body mass index of the Asia-Pacific region, you can compare it with yourself. Because of the simple and relatively accurate method of determining body mass index, except for some special people (such as muscular sports players), body mass index can well reflect the degree of obesity of a person, many places are using this method to determine whether obese. So when you’re not sure if you need to lose weight, you may want to use this method to determine.