Therefore, the normal average daily calorie requirement of an adult weighing 50kg is as follows: average calorie requirement = 4. 186kJ× 24 hours× 50kg = 5023.2kj, and the average calorie requirement of human body will increase by 0. 1MJ for every kilogram of body weight.
Generally speaking, an adult man needs about 9.25 to10900 joules every day; An adult woman needs about 7.98 to 8.82 million joules a day.
Pupils need about 9.25 million joules of heat every day on average, which is similar to the minimum heat required by an adult man.
Middle school students are developing and need to consume more calories. Boys need 10.465 MJ on average every day, while girls need 10.046 MJ.
Calculation method of food calories
(1) staple food: such as rice, porridge, noodles, etc. If 80 calories are taken as the calculation unit, the calories of 1/4 bowls of rice, half bowls of porridge or half bowls of noodles commonly used in daily life are equivalent to 80 calories.
② Meat, tofu and eggs: 37 grams of lean meat, 20 grams of fat meat, 80 calories. 125 grams of milk, two teaspoons or half a tablespoon of oil are 80 calories. It is worth noting that the calorie of 1 boiled eggs is 80 calories, but the calorie of 1 fried eggs is 120 calories.
③ Vegetables: 600g of any vegetable is equal to 80 calories.
④ Seafood: 100g is about 80 calories.
⑤ Fruit: 300g watermelon, 2 oranges, 80 calories.
Extended data
Calories are units of energy. We often associate calories with food, but in fact they apply to any substance that contains energy.
Simply put, 1 calorie of energy or heat can raise the temperature of 1 gram of water by 1 degree Celsius at one atmospheric pressure. 1 calorie is approximately equal to 4. 186 joules (joules are commonly used units of energy in physics).
Calories come from carbohydrates, fats and protein.
Thermal energy generated by carbohydrates = 4 kcal/g.
Heat generated in protein = 4 kcal/g.
Heat produced by fat = 9 kcal/g.
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 contains 4 calories, 1g protein contains 4 calories, and 1g fat contains 9 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.
Reference source: Baidu Encyclopedia-Calories