Instead of using static compression (squeezing) to transport fluid out of the limbs, NormaTec Pulse Technology uses dynamic compression (pulsing). The patented pulsing action more effectively mimics the muscle pump of the legs and arms, greatly enhancing the movement of fluid and metabolites out of the limbs after an intense workout. Veins and lymphatic vessels have one-way valves that prevent fluid backflow. Similarly, NormaTec Pulse Technology uses hold pressures to keep fluids from being forced in the wrong direction. Because of this enhancement, instead of tapering pressure off, the PULSE and PULSE PRO can deliver maximum pressure in every zone.