Patent ID: 8905901

Claim:
A device comprising: a main body; first and second arms extending from the main body and rotatably attached to the main body by way of a handle shaft; a locking mechanism connected to the first and second arms that prevents the first and second arms from rotating; a handle attached to the first and second arms; first and second wheels rotatably attached to opposite sides on a first end of the main body; a third wheel rotatably attached to a second, opposite end of the main body; a variable resistance system disposed inside the main body, the variable resistance system applying a resistance independently to each of the first and second wheels; a variable resistance system adjustment mechanism permitting a user to adjust the resistance independently applied to each of the first and second wheels; a thrust bar coupled to the variable resistance adjustment mechanism; a spring coupled to the thrust bar; a master cylinder coupled to the spring and providing a pressurized fluid to the variable resistance system; first and second calipers receiving the pressurized fluid from the master cylinder; and first and second rotors receiving pressure from the first and second calipers, the first and second rotors operably connected to the first and second wheels to provide rotational resistance to the first and second wheels.