Aerobics is a rhythmic exercise that combines endurance and strength training to the beat of music. It focuses on strengthening the cardiovascular system, improving the stamina of the exerciser and burning calories. Aerobic exercises can include a variety of movements, such as running in place, jumping, step sets, and stretching. This versatile form of exercise is designed to improve overall fitness, muscle tone and body composition while providing a fun and energetic way to exercise in a group setting.