Indoor cycling is an organized activity with a group fitness format. Classes focus on endurance, strength, interval, and high intensity training using the stationary bike. The indoor cycle that evolved from the stationary bike is designed with a heavy weighted flywheel, chain drive, and friction resistance offering an experience similar to that of a road bike. Cycling improves muscualr indurance, cardiovascular strength, and is low impact. A 45-minute indoor cycling workout can burn 350- 600+ calories.