Calorie Definition and Weight Loss

The food calorie is sometimes capitalized as Calorie to distinguish it from the chemistry calorie , but this capitalization is rarely observed in practice.

The calorie nutrition

Nutritionists measure the energy content of food in "calories" (sometimes capitalized and abbreviated as Cal
or sometimes C , or abbreviated kcal as if small calories were used ), where each food calorie represents 4,186 joules. This is equivalent to 1000 calories used in chemistry , and therefore the number of calories of food would be called a kilocalorie if small calories were used . However, in chemistry calories have been deprecated as a scientific unit of measure in favor of joules , and therefore in the modern common usage, the word "calorie" usually refers to a food calorie .

This provides two ways to talk about the amount of calories in foods that look quite different, but express the exact same amount of energy. We can say that dietary fat has nine kilocalories ( kcal ) per gram , while protein and carbohydrates have four calories per gram , or , one can say that fat has nine calories per gram while carbohydrates and proteins four calories per gram.

The amount of food energy in a particular food is measured by the complete combustion of the food in a bomb calorimeter , a method known as direct calorimetry. Dieticians recommend counting calories to avoid obesity . The United Kingdom recommends consumption of no more than 2000 calories (2000 kcal) for women and 2500 calories each day (2500 kcal) by men each day.

Physics and chemistry calorie

In physics or chemistry, a calorie (abbreviated cal) is a unit of energy that is equal to the amount of heat required to raise the temperature of one gram of water by 1 degree Celsius , at a pressure of 1 atm . This amount of heat depends somewhat on the initial temperature of the water, which results in different units sharing the name " calorie" but having slightly different energy values ​​:

* 15 ° C calories,
* The 4 ° C calorie , da
* The average of 0 ° C to 100 ° C in calories,
* The number of calories international steam table ,
* The number of calories thermochemical

Slight variations in these units can be seen if you convert joules. For example, a 15 ° C calorie is the amount of heat required to raise the temperature of 1 g of water from 14.5 ° C to 15.5 ° C. It is approximately equal to 4.1855 J or 3.968 × 10-3 Btu . The international calorie table steam is approximately equal to 4.1868 J and the 4,184 calorie thermochemical J.
Among these units, which is most often mean calorie cntemporary in English text is the 15 ° C calorie .

The food calorie is 1000 calories 15 ° C . As this could be a source of confusion and error , these units are now obsolete. Unit of the International System of Units ( SI) for heat ( and all other forms of energy ) is the joule (J) , while the ( obsolete) CGS ( centimeter gram second system of units) uses erg (energy and mechanical work unit centimeter - gram-second ) - from Wikipedia , the free encyclopedia .

Before you start to lose weight and counting calories you must first calculate the number of calories your body needs every day, because the amount varies from person to person , depending on gender, age , the weight content of the muscle or height . Averages are situated around 2000 calories for women and 2500 for men. An easy calculation, but not so precise that for every 500 less than your normal amount of calories each day , you will lose up to a pound ( 453.6 g ) per week.

Counting calories must be included in your diet , because when you weight loss is best to know how many calories to your diet , and thus ensure that the amount of calories burned each day is more than the quantity stored . All nutritionists agree that a low- fat healthy diet without counting calories could exist, so take your time and solve this problem with various calorie calculators .

Knowing all the time the amount of calories , you can control how much you eat and how it will affect your body. When dieting and counting calories you can eat almost anything , as long as you do not exceed the number of calories burned each day.

When you consume fewer calories, your body is forced to use stored fat to make up the deficit in your calories . The advice of the nutritionist is that you must combine psychical exercises with a healthy diet to create a calorie deficit.