| Body Solid Powerline Leg Extension & Leg Curl Model PLCE165X Training the lower body is crucial for balance, speed and coordination. The best exercises for developing the quadriceps and leg biceps are, without a doubt, the leg extension and leg curl. This machine is designed to allow the user to perform both of these exercises in their traditional upright and prone positions. Weight post is 1" diameter. Weight plates and collar optional. Manual  |