If you're eager to lose weight in a hurry, your first order of business is to pick one or more exercises with a high calorie burn. Running and bicycling aren't just simple exercises -- they're also virtually the fastest ways you can burn calories performing any activity. read more
Generally, cycling is an easier activity than running and will burn less calories per unit of time. However, if you are cycling hard you will burn more than if you are out on a light jog, and vice versa. read more
In general, running burns more calories per minute than cycling, Dr. Tanaka said, although the differential slims if you cycle vigorously. According to broad calculations from the American College of Sports Medicine, someone weighing 150 pounds who runs at a brisk seven minutes per mile will incinerate about 1,000 calories per hour. read more
The standard comparison is that one mile of running equals four miles of cycling, but that's lousy science. Although running requires the same amount of energy per mile at any speed (110 calories per mile), riding is affected by wind resistance so the faster you ride, the more energy you use. read more