An ergometer is a device used to measure the amount of work or exercise a person performs. It is also the general term used to describe a variety of hand, foot or combination exercise devices that allow people to exercise their upper and lower extremities while in a stationary position. The common stationary exercise bike is one type of ergometer. Most exercise ergometers use some form of hand or foot pedal for the basic motion. Many models allow for wheelchair access. Ergometers are very popular devices for performing exercise that provides cardiovascular benefit.