Aerobic exercise is any physical activity that uses large muscle groups and causes the body to use more oxygen than it would while resting. It is often referred to as 'cardio' and can include activities such as STEP, JOGS, DANCE, and HEART rate-raising exercises. The term aerobic is derived from the Greek word meaning 'with oxygen, ' and is used to describe a type of exercise that increases the body's need for oxygen. Popular brands of aerobic exercise equipment include Reebok, which produces a variety of aerobic shoes and apparel.