We know that in Physics First Law of Thermodynamics says "Energy can not be created or
destroyed. It can only be transformed from one form to another".
When we apply this rule on dieting we can easily understand what calories are and how they works.
Lets first understand what is a calorie?
A Calorie:
Amount of energy needed to raise temperature of 1 litter of water by 1 degree Celsius.
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when we eat food we use the energy stored within the food which helps you to produce movements and do works all day.
Energy can also be stored for later use in the form of glycogen and fats.
Calorie Balance:
There are three different states of calories balance and you can only be in one state at one time.
Negative Calorie Balance:
This occurs when someone burns more calories than he or she consumes. Your body needs more calories to produce energy for your daily functions that it gets from your food.
That means it make up the difference by burning stored energy meaning you will lose weight because the necessary energy will come from the breakdown of body tissue and negative calorie balance always results in weight loss.
Neutral Calorie Balance:
A person's intake of calories is the same as the expenditure of activities and body processes.This means that all the calories you consume will be used for some form of body process and your weight will remain stable. Its not 100% possible but it could be possible over the months. If your weight is not changed in a month means your calorie balance is neutral.
Positive Calorie Balance:
You have more calories in your body than you needs and that will be stored in the liver in the form of glycogen and fats.
This calorie balance will determine how much muscle you will gain or lose.