Over half the NFL, including the Superbowl Champs, use Run Rocket.
These elite teams can have any resistance machines they want in the world.
So why do they choose Run Rocket?
First and foremost, the resistance profile is perfect. For up to 36 yards the flywheel provides the exact type of resistance naturally felt while free running. Slightly higher in the begginning, tapering down to a flat resistance.
This allows the sprinters last steps in the acceleration phase to be their longest. The opposite happens when using rubber bands.
Run Rockets are highly portable, a time saver during training because athletes can easily change the resistance in seconds themselves, allowing the coach to focus on form and not have to mess around with equipment.