Also seen on line as Power Rider - crunch. This item has a monitor. It is used for strength and toning. You are able to use your own body weight in a way that is like lifting Weights. It benefits arms, shoulders, chest, Legs, buttocks and back. Videos are available on-line to demonstrate how to position hands and feet to get the most from the machine. It is quiet to use so that you can watch T.V. or You-tube while getting fit. The idea for this Machine was developed by Covert Bailey. A health and fitness researcher and author. He wrote `Fit not Fat`. It must be picked up. Cash at the time please.