Exercise

Any voluntary body movements that burn calories, including walking up stairs, vacuuming a floor, going for a brisk stroll, or engaging in a structured program of exercise.

Any process that requires oxygen. Often used to describe a form of exercise, aerobic exercise.

Any process that doesn’t require oxygen. Often refers to a form of short, high intensity exercise, known as anaerobic exercise.

Exercise that improves the efficiency of energy-producing systems that do not rely on oxygen. Examples include sprinting and weight lifting.