(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.
Muscles worked on the Unilateral Leg Extension Knee Curl -AeroStrength Hydraulic Fitness Equipment Machine