The cybex eagle nx calf is a top of the range piece of gym equipment that is made to promote natural movement so you work out safely and comfortably for the best results the seated exercise focusses on the legs and in particular the calf muscles and the machine is designed so that spinal compression is minimised and forces are directed through the users hips rather than shoulders the footplate is curved training the mid foot to take the load which gives better results and it comes with a 18