Note: Figures are based on moderate (as opposed to vigorous)
activity. A heavier person burns more calories, so the same amount
of physical activity can actually burn the same number of calories
but more quickly. But remember, exercising harder and faster only
increases the calories expended slightly. To burn more calories
it is better to exercise for a longer time.
Determining how many calories you burn is not an exact science.
This number should only be used as an estimate of calorie expenditure.