Rowing Machines have the advantage of using the entire body in a single, fluid motion. The seat on a rowing machine slides on rails and there are handles attached to stretchy cords that simulate the arm motion of using a paddle. Rowing is low impact and non-load bearing. At ActiveFitnessStore.com we offer Air Rowing Machines such as the Concept 2 model, used in gyms throughout the world. We also offer Magnetic Rowing Machines that are silent in operation and Water Rowing Machines. If you are serious about indoor rowing, we suggest water rowing machines.