What actually are calories…

Some would say…. the little Gremlins that make your clothes shrink overnight, women tend to decrease them and men try to increase them.

Calories…we’re always talking about them. We eat and count them. We burn and balance them. We watch them and cut them. And when we overeat them, we often curse calories for making us fat. For all the attention we pay to calories, you’d think we would have a pretty good idea of what they are. But the truth is, most people would find it difficult to explain exactly what calories are.

What Calories Are…and What They Aren’t

Many people think of calories as “things” in your food that, if you eat too many of them, will put weight on you. Eating more calories than you need will likely lead to weight gain, that part is certainly true. But calories aren’t “things” that you can see or touch. You can’t pick them out of your food or push them to the side of your plate. Love ‘em or hate ‘em, they’re something you simply cannot live without.

A calorie is simply a unit of energy—it’s a measurement, just like inches or degrees or kilograms. In technical terms, a calorie (or, when accurately used to describe the calories in food, a kilocalorie) is the amount of energy that is needed to raise the temperature of a kilogram of water by one degree Celsius. So what does that have to do with the calories on your plate?

A calorie is simply a unit of measurement of the energy in the foods that you eat. Your body doesn’t use energy to raise the temperature of water, but you need energy (measured as calories) to fuel all of your daily functions. This includes your basic metabolic processes, as well as all the activity you engage in throughout the day. In order for your body to tap into this energy, it first has to be released from the foods you eat.

Providing energy to the body is often compared to the way you provide energy to your car. When you put fuel in your car’s tank, there is energy (which could also be measured in calories!). But just having petrol in the tank isn’t enough to make the car move.

In order for that to happen the fuel has to be ignited in the engine, which releases the energy from the  petrol —energy that can be used to propel the car.

Similarly, the food (fuel) that you eat has energy in the form of calories that are locked up in the protein, fat and carbohydrate (and sometimes alcohol….) that you eat. Much like the energy is released when the petrol ignites in your car’s engine, the food you eat has to be digested and metabolized to release the energy that can be used to fuel your body.

These calories are absolutely necessary to life. Your resting metabolic rate (the number of calories your body uses every day for the most basic processes just to keep you alive) accounts for about 75 percent of the calories your body uses every day. The remaining amount that you burn during the day are used to fuel your muscles, as you move around throughout your day and engage in exercise. And a very small amount is used to digest and process your food.

How to Calculate Each Calorie in a Serving of Food

So, what are the sources of calories in the foods that we eat? The big three macronutrients—protein, fat and carbohydrate which i have previously discussed in my blog—provide the majority of the calories we eat. Here’s how it breaks down. A gram of protein has 4 calories’ worth of energy; a gram of carbohydrate also has 4 calories locked away. Fat is a more concentrated source of energy: each gram of fat contains 9 calories of energy.

There’s one other calorie source that’s considered separately, and that’s alcohol. That’s because a gram of pure alcohol has 7 calories, nearly as calorie-dense as pure fat, know you now why after a big weekend your abs are nowhere to be seen !!!! 

The values of 4 calories per gram of protein or carbohydrate, 9 calories per gram of fat, and 7 calories per gram of alcohol are used to determine the calorie counts of foods. Let me walk you through a simple example.

Another thing to keep in mind: Some things in your foods have no calories at all, such as water and fiber. Water and fiber add volume to foods without adding any calories at all. That’s why foods that are high in fiber and water content (like fruits and vegetables) have a lot fewer calories per bite than foods that contain very little water or fiber.

The trick is not to worry about calories but be mindful of what they are. Find out how many you need it really is as as simple as calories in vs Calories out no Einstein Mathematicians needed, keep a written food diary or use my fitness pal 70% of people underestimate the number of calories they eat per day. 

1 Krispy Kreme Doughnut = 218 Burpees

1 Mc Donalds Big Mac = 506 Burpees

1 Caesar salad = 671 Burpees (Dark Horse ) 

1 Dominos Supreme Pizza = 1,266 Burpees

So if you still can't get your head around Calories or simply can't be bothered to track them , take two a a few minutes and look up how many burpees you will have to do to burn the equivalent in calories, life is about balance but being mindful is the key.