The simple design of this unique . non-motorized treadmill is also what makes it one of the most effective devices for high speed and interval training. Unlike standard electric treadmills . the Pro6 Arcadia Air Runner features an innovative curved deck that is completely controlled by the movements and force of the athlete using it. There are no on/off switches or complex buttons and settings to worry about. It’s a manually operated treadmill that helps train and promotes technically-sound running posture . balance . and cadence.The Pro6 Air Arcadia Runner is also one of the only non-motorized treadmills on the market that offers adjustable resistance. At low resistance settings the near friction-less belt system allows a smooth glide for high speed and interval work. While higher resistance settings can simulate heavy sled and power training. The non-motorized Arcadia Air Runner requires very little maintenance and zero electrical consumption. The Pro6 Arcadia Air Runner offers one-of-a-kind workout experiences while creating the nearest simulation of genuine road running.