Medium size french fries

Calories: 380

Fat: 19 grams

Now burn it off with:

70 minutes of low-impact aerobics

55 minutes on the Stairmaster

45 minutes of calisthenics (pushups, sit ups, etc.)

3-ounces lay’s potato chips

Calories: 450

Fat: 30 grams

Now burn it off with:

135 minutes of miniature golf

90 minutes of car washing

50 minutes of rock climbing

Starbucks venti white chocolate blended crème frappuccino w/whipped cream

Calories: 510

Fat: 20 grams

Now burn it off with:

90 minutes of playing cricket

80 minutes of bike riding (around the neighborhood)

75 minutes of Strength Training

3 Otis spunkmeyer chocolate chip cookies

Calories: 360

Fat: 16 grams

Now burn it off with:

90 minutes of ultimate Frisbee

80 minutes of hatha yoga

55 minutes of rearranging furniture

Large slice of pepperoni pizza

Calories: 729

Fat: 37 grams

Now burn it off with:

115 minutes of ballroom dancing

70 minutes of shoveling snow

65 minutes of running at 6.0 mp

Your average strawberry frosted doughnut contains about 240 calories (not too bad) and 10 grams of fat (ouch!). That's not exactly a caloric nightmare—as long as you limit yourself to just one. (And we all know how hard it can be to stop once you get started.)

According to SparkPeople.com's Fitness Tracker, a 150-pound woman who walks briskly at a 15-minute mile pace (4 mph) will burn 5 calories per minute. To burn off the doughnut you'd have to walk around the office (at this quick pace) for 48 minutes, which is just over 3 miles!

Physical exercise helps you burn off calories, lose weight and maintain long-term control over your weight. Walking is a cheap and easy exercise. According to the Harvard Medical School, it can have a positive impact on your health and well being.

3.5 MPH

The number of calories you burn depends on several factors. These include your weight, the speed you walk at and the time you spend walking. If you weigh 185 lbs. and walk 3.5 mph for 30 minutes, you will burn off 178 calories. This figure equates to burning 6 calories every minute.

4 MPH

If you weigh 155 lbs. and walk at 4 mph, or one mile every 15 minutes, you'll burn 167 calories every half hour. This equates to 5.5 calories every minute.

4.5 MPH

If you weigh 125 lbs. and walk at 4.5 mph, or one mile every 13 minutes, you'll burn 150 calories every 30 minutes. To work out the number of calories you burn every minute, simply divide 150 calories by the number of minutes you plan to walk. In this example it's 30 minutes, which equates to 5 calories per minute.