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Calories, and what they are!

First, what is a calorie?

A calorie is the energy needed to raise the temperature of water through 1 degree. It is equal to 1000 small calories and is often used to measure the energy values in food.

1g of Protein is 4kcals – Proteins will be stored as protein.

1g of Carbohydrates is 4kcals – Carbohydrates will be stored as glycogen.

1g of Fats is 9kcals – Fats will be stored as adipose tissue or intracellular fat stores.


Thermodynamics. (the relationship between heat and other forms of energy)

When we eat, we are consuming energy, so our internal energy changes due to the conversion of energy. So, when people say we can eat more and not gain any weight, this cannot be true. We can’t create or destroy energy; it can only be transformed into another form of energy.

If you eat too much, you will store energy, which equates to fat.

On the other hand, if people state they have started eating more and are losing weight, this is because your none exercise activity thermogenesis (NEAT) has increased. You are giving your body more energy to work with. So, from your training sessions being a lot more intense to walking up the stairs at work. With out even realising you are going to be a lot more active.


All in all, to get where you want to be, it comes down to calories in vs calories out. To lose weight, you need to be more active and eat less calories, to put weight on you need to be less active and consuming more calories.

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