Power Leverage V2 Viking Press / CalfPower Leverage V2 Viking Press Calf Machine Build Upper Body Power and Lower Body Strength The Power Leverage V2 Viking Press Calf Machine by Muscle D Fitness is a versatile, dual function machine designed to strengthen both the upper and lower body. Combining a Viking press for explosive shoulder and triceps development with a calf raise station for building lower leg strength, this machine is ideal for lifters looking to add power and size