Adult men need 9250- 10090 kilojoules every day.

Kcal, 1 kcal = 1 kcal.

1 kcal = 4. 184 kcal

1 calories: heat can make 1 water rise 1 degrees Celsius.

Calorie (Cal for short), transliterated from English Calorie, is defined as the heat required to raise 1 gram 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.

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:

Calorie function:

① 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.

② heat source

Calories come from carbohydrates, fats and protein.

Heat generated by carbohydrates = 4 kcal/g.

Heat generated in protein = 4 kcal/g.

Heat produced by fat = 9 kcal/g.

(3) Accurate calculation of base heat.

Woman:

Age formula

18- 30 years old 14.6 x body weight (kg) +450

3 1- 60 years old 8.6 x weight (kg) +830

Over 60 years old, 10.4 x body weight (kg) +600

Man:

18- 30 years old 15.2 x body weight (kg) +680

3 1- 60 years old 1 1.5 x body weight (kg) +830

Over 60 years old 13.4 x body weight (kg) +490

④ Metabolism

Generally speaking, adults need at least 1500 kcal of energy every day to maintain body function, because even if you lie still, your body still needs energy to maintain body temperature, cardiopulmonary function and brain operation.

Basal metabolic consumption varies with individual height, weight, age and gender. Human survival needs energy, which is obtained from food. The calorie content in food is a measure of how much potential energy food produces.

1g carbohydrate has 4000 calories, 1g protein has 4000 calories, and 1g fat has 9000 calories. Food is generally composed of these three substances. Therefore, as long as we know the contents of these three substances in food, we can know how much heat or energy food contains.

Our body "burns" calories in food through metabolism, which 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.

⑤ The following are the main points of the principle of "enough is enough":

Try to eat different kinds of food; Eat a lot of vegetables and fruits; Eat a proper amount of grain (rice, whole wheat bread, noodles, biscuits and oats, etc.). ); Eat less meat, preferably skinless fish or chicken, and eat less meat such as pigs, cows and sheep.

Wooller, an American nutritionist, said that the simplest formula to judge how many calories a person should consume is to multiply the kilograms of body weight by 30. Humans need about 30 calories per kilogram of body weight. For example, they weigh 60 kilograms and need 1800 calories every day.

However, nutritionists can also cite many examples to show that this algorithm is not completely accurate. Because genes, diet, nutrition and other factors will have an impact.

References:

Baidu Encyclopedia-Calories (Calories Unit)