Form and performance - can one exist without the other? It shouldn't. The CYBEX VR3 resistance strength line exercises the theory that form and performance belong together. VR3 is a collection of machines that combine striking appearance, excellent performance, genuine comfort and accessibility - without sacrificing the goal of functionality. If you want form and performance, the VR3 line delivers both. 22 adjustable pulley positions provide maximum versatility. Obviously, the more pulley positions, the greater specificity in directing the force needed to train very targeted muscles. This product alone enables users to do almost all and any movement pattern, upper and lower body. 2.5 to 152.5 lbs. (1 kg to 70 kg). 2.5 lb (1 kg) minimum effective resistance when used with single handle [which is low enough for seniors and rehab applications] up to maximum effective resistance of 152.5 lbs (70 kg) [useful for the serious trainer]. 2:1 resistance mode when used with both handles. Cybex also provides a 4:1 resistance mode when used with a single handle which is ideal for high speed training. The dual handles provide added training variety and allow each arm to be treated independently which is particularly useful when one arm is injured or weaker.