FitSugar

Back to Basics: Calories Explained

FitSugar — Wed, 03 Dec 2008 03:00:00 PST

We talk, or at least think, about calories almost daily. You cut calories. You count them. You burn them. But do you know what a calorie is?

Simply put, a calorie is a unit of energy. When you eat, you're fueling your body with potential energy in the form of calories, which your body uses not just for exercise but for vital functions like breathing. Basically, a calorie is the amount of energy it takes for the temperature of one gram of water to increase by one degree Celsius, or 1.8 degrees Fahrenheit. However, when we talk about calories burned or calories consumed we are technically talking about kilocalories, each of which equals 1,000 calories. Kilocalories are most often referred to as calories for short. Scientifically speaking, the term is capitalized, but in most literature about food and exercise "calorie" is written in all lowercase and it's assumed we are all talking about the same unit of measurement.

Foods are made out of mixtures of macronutrients: protein, carbs, and fat. Protein and carbs each contain four calories per gram, while fat contains nine calories per gram. These caloric amounts represent the amount of potential energy these macronutrients provide.

To see how the body burns calories, just

read more. The body uses calories for three distinct categories of activities. One is your basal metabolic rate (BMR), or how many calories your body burns just to keep the basic operations going - heart beating, kidneys functioning, lungs breathing. Sixty to 70 percent of all calories go toward just keeping your body operational, kind of like overhead expenses. The body also needs calories for physical activity, be it washing your dishes, walking your dog, or running a marathon. The third component of calories burned is the thermic effect of food, or how much energy it takes to digest your food to turn it into energy. Your body burns 10 percent of overall calories consumed to fuel the digestion process of those calories you just consumed. Food is energy, or calories, that you put into your body to fuel all your activities for the day. If you do not use all that fuel, your body stores the fuel just in case you need it during a famine, and you gain weight. If you use more fuel than you have consumed, by burning more calories than you have eaten, you will lose weight. The Health Guide has some pretty cool tools to help you understand your personal relationship with calories. To see how many calories your body requires to maintain your weight, check out this Nutritional Needs Calculator. To see roughly how many calories you're burning during a variety of activities, visit the Calorie Burner Calculator. Source

Back to Basics: How The Body Burns Calories

FitSugar — Tue, 24 Jul 2007 09:30:00 PDT

This may seem like sixth grade science class all over again but if you are trying to lose calories, then you should know the basics of how your body burns them. Here are the three primary functions the body uses for burning calories from RealBuzz.com:

Basal metabolic rate. Your BMR accounts for about 60% of your daily calorie burn, and is simply there to keep your body alive, irrespective of your activity levels.
Activity and exercise. The fuel that you require for your daily activities – from every small movements through to harder exercise – accounts for the next 30% of your calorie expenditure.
Thermogenesis. Every time you eat, digest, absorb and utilize food, heat is generated – which is referred to as the ‘thermogenic effect’. This meal-induced heat production accounts for the remaining 10% of your calorie expenditure.

So it is important to always keep the three primary calorie burning functions in mind when going through our weight loss journey. Especially activity and exercise as this is the one area where most of us are majorly lacking -- Coincidentally it also happens to be the area that we have the most control over.

Source

Calories and the Weight Loss Formula

Leta Shy — Thu, 10 Nov 2011 00:39:58 PST

Whether we're burning calories by sweating it out at the gym or resisting the call of the cupcakes, calories definitely affect our waistlines. Understanding the fundamentals of calories is about more than just reaching for the low-cal option. If you're watching your weight or looking to lose some, here's what you need to know about calories to keep you going.

What's a Calorie?
A calorie is just a form of energy. We burn calories all the time, whether merely breathing and sleeping or running a seven-minute mile. Metabolism is the rate at which our bodies use up this energy; the amount of calories we burn by simply existing is called our BMR, or basal metabolic rate (calculate your BMR here). Your BMR, age, and activity level are used to determine how many calories you should be eating in order to maintain your weight.

If you want to lose weight, however, the formula is simple: burn more calories than you eat. But that doesn't mean it's easy. It can be hard, and all-consuming, to keep track of every single calorie you eat or burn. Whether you're a calorie counter or someone who barely glances at labels, read on for tips on how to track calories to help you lose weight.