If you are running, your body is using calories from the foods you eat to supply energy. Calories come from fats, carbohydrates and proteins. Your body needs these for fuel. Running is an exercise that will burn off calories and help you maintain a healthy weight.

The weight-loss deadline you've set -- whether it's a wedding, spring break or a reunion -- requires you to lose 2.2 pounds per week.

Running on an uneven surface, such as sand or grass, increases the number of calories you burn with each step. Your body burns extra energy on uneven surfaces just to keep you stabilized and to propel you forward from a sunken position.

To effectively lose weight, you must burn more calories than you eat. Cutting your calorie intake is often the best way to shed pounds. However, eating too few calories can contribute to negative side effects. Unless medically supervised, avoid following very low-calorie meal plans.

To lose one pound of fat, you must burn 3,500 calories more than you consume. If you've ever paid attention to the number of calories you burn during an easy cardio workout, like walking on the treadmill for 30 minutes, the idea of creating a 3,500 deficit may seem a little overwhelming.

Singing won't get you to shed pounds the way running or a gym workout does, but singing standing up will burn a number of calories comparable to walking, yoga or light housework.

The number of calories you need if you're a 220-pound man varies based on several different factors, including your age, activity level and body composition. You can figure out a good estimate, however, to narrow down how much you should be eating each day -- whether your goal is to lose, gain or maintain your weight.

Burning calories happens every minute of every day, whether you're sleeping or sprinting at 10 mph. While burning 5,000 calories per day through exercise and other activities is a challenge for the average person, once you've subtracted your basal metabolic rate from 5,000, the remaining amount appears more reasonable.

Kissing is good for your relationship, but you may wonder if it does your body any good. Stop wondering. Giving your lips a good workout apparently is okay for the rest of you as well: Kissing burns calories.

As with all calorie calculations, the amount burned while running depends on your weight, your gender and the intensity of exercise. Running is considered a vigorous exercise. That means it burns calories at a high rate.

You burn calories as you exercise and go about your daily activities. Your body also burns plenty of calories on its own just carrying out normal metabolic processes, such as digestion and circulation. You even burn calories while you sleep.

Your body's energy comes in the form of calories. The more energy you need, the more calories you burn. Calculating how many calories you burn in a day must take into account your basal metabolic rate and your overall activity level.