The human body consumes energy all the time, which is provided by thermogenic nutrients in food. In 2000, China Nutrition Society put forward the reference intake of dietary energy for China residents, pointing out that adult male light and moderate manual workers need 2400-2700 kcal of energy every day; The daily energy requirement of female light and moderate manual workers is 2100-2,300 kcal. Infants, children and adolescents, pregnant women and nursing mothers, and the elderly have different physiological characteristics, so do their energy requirements.

Reference: Daily calories required by adults (1 calories =4. 184 kilojoules)

Male: 9250- 10090 kilojoules?

Female: 7980-8820 kilojoules?

Note: the daily calories provided by food should be no less than 5000 -7500 kilojoules, which is the least energy to maintain normal life activities of human body.

In other words, you should be healthy and eat at least 1200 calories every day.

People consume at least three calories a day.

The basic heat needed by human body's basic metabolism+the heat needed by physical activity+the heat needed by digesting food. ?

Simple algorithm of basal metabolism =?

Woman: Basic calories (kilocalories) = weight (kg) x9?

Man: basic calorie (kcal) = weight (kg) x 10?

Physical activity algorithm = weight (kg) * activity intensity coefficient * hours.

Reference Baidu Encyclopedia-Heat