Impulse Escalate dual leg extension & leg curl combines these two popular exercises in one simple-to-use, efficient machine, saving on space & making working out easier. The dual-function machine works both the quadriceps & the hamstrings & has an easily adjustable leg roller & back support. Using the hand grips helps you to control your motion, & the 125kg (275lbs) weight stack offers the necessary resistance to get your legs working very hard. The cushioned seats encourage you to relax when working out & the angled back position reduces tension in your hamstrings.