Calorie is a kind of calorie unit, which is mainly used for fitness and nutrition. This unit has not been completely unified internationally, and some countries use joules instead of cards.
Calories, abbreviated as card and cal, are transliterated from English. It is defined as the heat required to raise 1 gram of water to 1 degree Celsius at 1 atmospheric pressure; It is widely used in nutrition measurement and fitness manuals, and the international standard energy unit is Joule.
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 China, calories are still widely used in Chinese mainland and Taiwan Province provinces due to tradition.
Energy or heat of 1 calorie can raise the temperature of 1 gram of water at one atmospheric pressure 1 degree Celsius. 1 calorie is about 4. 1859 Joule (Joule is a commonly used unit of energy in physics).
The daily activities of the human body also consume calories. 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.
The human body "burns" calories in food through metabolism. Metabolism breaks down carbohydrates into glucose and other sugars through enzymes, fats into glycerol and fatty acids, and protein into amino acids. Then, these molecules are transported to cells through the blood stream, where they can be absorbed and utilized immediately, or they can enter the final metabolic stage to react with oxygen and release their stored energy.