The cybex eagle nx seated leg curl with start rld lets you strengthen and work primarily your hamstrings but also other leg muscles such as your calves and thighs this fitness machine is of the highest quality and has a range limiting device rld and an angled back pad that users can adjust easily with one hand ensuring excellent comfort and stability and decreased tension in the hamstrings the weight machine is easy to use and features a lower leg pad that improves comfort during each repet