Ganas leg extension machine plate load series KY-PA31 is a fitness equipment specially designed for exercising quadriceps muscles. It allows users to perform exercises in a seated position, reducing stress on the lower back.The plank leg extension/curl is one of our most popular plank leg training machines, and for good reason. It offers two leg-burning exercises in a small footprint. The backrest of the plank leg extension/curl adjusts to an upright position for leg extension. When the push-out pin is released, the back drops smoothly to a downward angle, promoting proper body alignment during leg curls. Strategically placed handles allow you to lock into place during both exercises。