This is why some women have small breasts and thick arms.

Because fat is free, if it is not "driven", it will run around. Doing sit-ups is to consume energy, convert fat into heat, and achieve the purpose of losing weight.

The nature and characteristics of fat mainly depend on fatty acids, and the types and contents of fatty acids contained in fat in different foods are different. There are more than 40 kinds of fatty acids in nature, so various fatty acid triglycerides can be formed; Fatty acids usually consist of 4 to 24 carbon atoms.

Extended data:

The sources of fat can be divided into the following two types:

Animal sources: fats stored in animals: such as lard, butter, sheep oil, fish oil, bone marrow, fat meat, cod liver oil, etc. Fat in animal milk: such as cream.

Plant source: Plant fat source is mainly extracted from plant fruits, such as sesame, sunflower seeds, tea, walnuts, pine nuts, soybeans and so on.

The main sources of fat are cooking fat and the fat contained in food itself. Table 5 shows the fat content in several foods. As can be seen from the figures in the table below, the fat content of nuts is the highest, all kinds of meat are in the middle, and the content of rice, flour, vegetables and fruits is very small.

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