Cal means:

1, cal, transliterated from English Calorie, is defined as the heat required to raise 1 g of water to 1 degree Celsius at 1 atmospheric pressure; Calorie is an energy unit, which is still widely used in nutrition measurement and fitness manual. The international standard unit of energy is joule.

2. As the legal unit of food calories, joules are widely used in Europe, while calories are used in the United States. Although Joule is the legal unit in Chinese mainland and Taiwan Province Province, it is still widely used in Chinese mainland and Taiwan Province Province because of tradition.

Extended data:

Heating action:

First, just as computers consume electricity and trucks consume oil, so do human daily activities. Heat not only provides energy for people's exercise, daily work and life, but also provides energy for human life activities, blood circulation, breathing, digestion and absorption. People who lose weight can burn fat through exercise, which can accelerate calorie consumption and achieve the goal of healthy weight loss.

Second, the heat source:

1, calories come from carbohydrate, fat and protein.

2. Thermal energy generated by carbohydrates = 4 calories/gram.

3. Heat generated in protein = 4 kcal/g.

4. Heat generated by fat = 9 calories/gram.

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