When Do Calories Burn?

The amount of calories burnt during exercise depends on the workout, it's duration and intensity, and your body weight. In other words, the longer an exercise session and the higher the intensity, the more calories will burn. A heavier person will burn more calories than a lighter person doing the same exercise. And men will burn more calories than women for the same exercise because men have bigger muscle mass. Moreover, calories burn more readily during exercise that employs large muscles, like rowing or running. Exercise that requires you to support your own weight will generally use up more energy than if weight is supported by equipment.

Here are a few examples of burnt kilocalories per hour for a person weighing 155 pounds / 70 kg: