Grab the sledgehammer with both hands ensuring a good grip.
Stand perpendicular to the rubber pad-hitting surface.
The amount of force required to compress the hitting surface depends on the tension of the 8 springs attached to the brake mechanism.
Strike the rubber pad with as much force as possible ensuring that the sledgehammer does not slide or slip out of your hand.
The switch is wired to a battery and a buzzer, when sounded place the sledgehammer to the starting position and move to the next station.