Calf Machine in BlackStrong Calves. Earned, Not Faked. Train with up to 300 kg safely, comfortably, and effectively. The Gorilla Sports Calf Machine training that actually hits Calves are stubborn they need real resistance. The Gorilla Sports calf machine is built for exactly that: with a load capacity of up to 300 kg on the plate holders, you give your calves the stimulus they need to grow. Five level adjustable leg pad and foot plate let you dial in the perfect position