Biking utilizes the X-Bike, which features adjustable free-wheel resistance to simulate outdoor riding and promote proper cycling form. The side-to-side movement in the adjustable-resistance handlebars strengthens your upper body. Balance, power and core stability are increased as you smoothly coordinate upper and lower body movements. This, combined with interval training (i.e. maximum effort interspersed with relief periods), increases metabolic costs, boosting cardiovascular-vascular output. The end result is an experience similar to outdoor cycling, in a controlled, supportive environment.