What is "aerobic" exercise?

What is "aerobic" exercise?

John Spencer Ellis (Author, TV Show Host, Trainer and CEO, National Exercise & Sports Trainers Association) gives expert video advice on: What is the most common fitness mistake?; What is the difference between fitness and physical activity?; Why is exercise so important? and more...

Aerobic exercise is not dance exercise, contrary to some popular belief. “Aerobic” literally means “with oxygen,” so aerobic exercise is doing exercise when oxygen is the primary source of energy. You may go in and out of other sources of energy. However, oxygen is the primary source. Aerobic exercise uses large muscle groups for an extended period of time: twenty to thirty minutes; even an hour or more.