Calories, transliteration of French calories, are units for calculating calories, which can be divided into big cards and small cards. 1 calorie is equivalent to the heat used to raise 1 liter of water to 1 degree Celsius at 1 standard atmospheric pressure; 1 calorie equals 1000 calories.
All the calories our body needs come from food. When eating, the chemical action of human metabolism decomposes food and converts it into energy. Daily activities, from breathing to running a marathon, are driven by burning calories.
Thermal action
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.
heat source
Calories come from carbohydrates, fats and protein.
Carbohydrate generates heat energy = 4 kcal/g.
Heat generated in protein = 4 kcal/g.
Heat produced by fat = 9 kcal/g.