The Unilateral Leg Extension - Knee Curl

(To view the Single Cylinder (bilateral) Leg Extension Curl click HERE.) This machine is a Unilateral Leg Extension-Knee Curl and has 2-cylinders, one for each leg.  Each leg's resistance is independent of the other. This machine is also called the Double Leg Ext, Double Knee, Unilateral Quad Extension, Dual Quad/Ham, Leg Curl, and Hamstring Curl.