This is because the pedals insert into the hollowed out structure of a specially designed cycling shoe. The rider simply slides the pedals into openings of the shoe, and begins to pedal. However, the mechanics of pedalling are quite different.

Instead of just unnaturally rotating the pedals, the Heel Strike Bike incorporates a greater range of human bio-mechanics into the process. That is, in each cycle of driving this bike, the rider is forced to take a step. This employs the additional leverage of the foot and calf muscle.

Pedalling in this manner will increase propulsion of the bicycle, as the rider will be both cycling and running simultaneously. I imagine the cyclist operating this bike from a standing position, maintaining an aerodynamic profile whilst gripping the handlebars. This bike should offer a satisfying sensation of running at an incredible rate for a sustained period of time.