Exercise machine
An exercise machine is any machine used for physical exercise. These range from simple spring-like devices to computerized electromechanical devices to recirculating-stream swimming pools. Most exercise machines incorporate an ergometer. An ergometer is an apparatus for measuring the work a person exerts while exercising as used in training or cardiac stress tests or other medical tests. Resistance machines Weight machines Weight machines use gravity as the primary source of resistance, and a combination of simple machines to convey that resistance, to the person using the machine. Each of the simple machines (pulley, lever, wheel, incline) changes the mechanical advantage of the overall machine relative to the weight. Other kinds of resistance machines Friction machines Spring-loaded machines (such as Bowflex) Fan-loaded machines Fluid-loaded machines Bullworker Hydraulic equipment Whole body vibration Outdoor gym Pneumatic exercise equipment Treadmill Endless-path machines Stationary bicycles Exercise bicycle Running/walking machines Treadmill Elliptical trainer Elliptical machines Ellipticals (elliptical machines) are a combination of stair-climbing and a treadmill. Generally it contains two tracks upon which the user stands. Users describe an elliptical motion (hence the machine name) while walking or jogging. Some ellipticals have magnetic resistance controls that add difficulty to doing the motion. Glider machines This machine allows