First, the definition of calories
Calorie, abbreviated as card, abbreviated as cal, is transliterated from English. It is defined as the heat required to raise 1 gram of water to 1 degree Celsius at 1 atmospheric pressure; Calorie is a kind of heat unit, which is widely used in nutrition measurement and fitness manuals. The international standard energy unit is joule.
Second, the physiological function
Just as computers consume electricity and trucks consume oil, so do human daily activities. In addition to providing people with energy needed for sports, daily work and life, heat also provides energy needed for human life activities, blood circulation, breathing, digestion and absorption, etc.
People who lose weight can burn fat through exercise, and can achieve the effect of accelerating calorie consumption to achieve healthy weight loss.
Third, the food source
Where does the heat come from? Carbohydrates, fats, protein.
There are three kinds of calories in the essential fuel and food of the body.
First, the body's essential fuel
Calorie is a transliteration of French Calorie, which is a unit for calculating calories, and it can be divided into big cards and small cards. 1 kcal is equivalent to the heat used to raise 1 liter of water 1 degree Celsius at 1 standard atmospheric pressure; 1 kcal equals 1000 kcal.
All the calories our body needs come from food. When eating, the chemical action of human metabolism breaks down food and converts it into energy. Daily activities, from breathing to running a marathon, are driven by burning calories.
Burning heat is one of the metabolic processes. If the body needs enough oxygen, water and food, cells will work actively and burn calories at the best speed. Therefore, a healthy diet, good digestion, proper minerals and vitamins, and regular exercise are indispensable.
Second, there are three kinds of calories in food.
There are three kinds of calories in food: protein's calories are the basic nutrients to strengthen muscles, mainly from meat, dairy products and eggs, and each gram contains 4 calories.
The calorie of carbohydrate is the main energy source of human body under normal circumstances, which is contained in rice, flour, noodles, bread, cereal, vegetables and fruits, and the calorie per gram is also 4 calories; Fat contains 9 calories per gram, which is contained in oil and cream.