First of all, what is a calorie? Technically speaking, a calorie is the amount of energy needed to increase the temperature of 1 gram of water by 1 degree Celsius. In terms of food, calories are energy obtained from food that your body uses for cellular respiration. To put it simply, you must eat calories to live.
How many calories do you need to eat per day? The amount of calories a person needs per day depends upon the person's weight, height, age, sex, and level of activity. Check out the Mayo Clinic's calorie calculator, and find out what you should be eating.
How do you burn calories? You are burning calories constantly. You burn calories when you breathe, eat, and even sleep. However, the best way to burn calories is through exercise. Different exercises burn different amount of calories. Try Discovery Health's Activity Calorie Burn Rate Calculator for specific examples.
Not all calories are created equal. Nutritionists either agree or disagree with this statement. After all, a calorie is a calorie. However, most nutritionists would agree that eating 100 calories of raw vegetables is healthier than eating 100 calories of candy.
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