Exercise is very important, it boosts the metabolism and burns off calories. The chart below gives a rough estimate of how much you would burn off doing certain popular activities. The chart is based on a person that weighs 150 pounds. If you weigh more than you will burn up more calories, if you weigh less the reverse is true and you'll burn up less. To find out how many calories you would burn up for your weight all you would have to do is, divide your weight by 150 and multiply the number of calories in the chart by that number.