Impulse escalate dual leg extension and leg curl combines these two popular exercises in one simple to use efficient machine saving on space and making working out easier the dual function machine works both the quadriceps and the hamstrings and has an easily adjustable leg roller and back support using the hand grips helps you to control your motion and the 125 kg 275lbs weight stack offers the necessary resistance to get your legs working hard the cushioned seats encourage you to relax