Keep on Walking

On average, every minute of walking can extend your life by 1.5 to two minutes, according to the American Podiatric Medical Association. Walking an extra 20 minutes a day will burn off seven pounds of fat per year. A brisk walk can burn up to 100 calories per mile, or 300 calories per hour. The average person walks about 115,000 miles in a lifetime -- more than four times the circumference of the globe.