Calorie Definition And Weight Loss

Calorie Definition And Weight Loss



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

The Nutrition Calorie

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 being used),​ where each food calorie represents 4,​186 joules. This is​ equivalent to​ 1000 of​ the​ calories used in​ chemistry,​ and thus the​ food Calorie would be called a​ kilocalorie if​ small calories were being used. However,​ in​ chemistry calories have been deprecated as​ a​ scientific unit of​ measure in​ favor of​ joules,​ and therefore in​ common modern usage the​ word "calorie" usually refers to​ a​ food calorie.

This situation provides two ways of​ talking about the​ amount of​ calories in​ food which look quite different but that express the​ exact same amount of​ energy. One may say that dietary fat has nine kilocalories (kcal) per gram,​ while proteins and carbohydrates have four kcal per gram,​ or,​ one may say that fat has nine Calories per gram while carbohydrates and proteins have four Calories per gram.

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

The Physics and chemistry calorie

In physics or​ chemistry,​ a​ calorie (abbreviated cal) is​ a​ unit of​ energy that equals the​ amount of​ heat necessary 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​ various different units sharing the​ name of​ "calorie" but having slightly different energy values:

* the​ 15 °C calorie,​
* the​ 4 °C calorie,​da
* the​ mean 0 °C to​ 100 °C calorie,​
* the​ International Steam Table calorie,​
* the​ thermochemical calorie,​

The slight variations in​ these units can be seen if​ you convert them to​ joules. For example,​ one 15 °C calorie is​ the​ amount of​ heat necessary to​ raise the​ temperature of​ 1 g of​ water from 14.5 °C to​ 15.5 °C. This is​ approximately equal to​ 4.1855 J or​ 3.968×10-3 Btu. the​ International Steam Table calorie is​ approximately equal to​ 4.1868 J and the​ thermochemical calorie 4.184 J.
Of these various units,​ what is​ most commonly meant by calorie in​ cntemporary English text is​ the​ 15 °C calorie.

The nutritional Calorie represents 1000 of​ these 15 °C calories. Since this could be a​ source of​ confusion and error,​ these units are now deprecated. the​ International System of​ Units (SI) unit for heat (and for all other forms of​ energy) is​ the​ joule (J),​ while the​ (obsolete) cgs (centimeter gram second system of​ units) system uses the​ erg (unit of​ energy and mechanical work in​ the​ centimeter-gram-second system) - From Wikipedia,​ the​ free encyclopedia.

Before start losing weight and counting calories you must first calculate the​ number of​ calories your body needs everyday,​ because this amount changes from person to​ person,​ depending on​ sex,​ age,​ weight,​ muscle content or​ height. Averages are situated around 2000 calories for women and 2500 for men. an​ easy,​ but not so accurate calculation is​ that for every 500 less than your normal amount of​ calories eaten every day you will lose up to​ one pound (453,​6g) per week.

Counting calories must be included as​ part of​ your diet,​ because when you loss weight is​ best to​ know how many calories your food has,​ and so ensuring that the​ amount of​ calories burned each day is​ more than the​ amount stored. All nutritionists agree that a​ healthy low fat diet without counting calories could not exists,​ so take your time and solve that problem with various calorie calculators.

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

When you eat fewer calories,​ your body is​ forced to​ consume the​ fat stored to​ make up the​ deficit in​ your calorie count. Nutritionist’s advice is​ that you must combine psychical exercises with healthy eating in​ order to​ create some calorie deficit.




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