Stationary bicycle

A pedal-powered exercise machine fixed in place, designed to reproduce the pedaling action of cycling without forward travel.

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Flywheel: A rotating mass that stores kinetic energy and smooths changes in rotational speed. Its inertia can make pedaling feel more like the momentum of a moving bicycle.
Cardiopulmonary exercise testing: A clinical test that measures heart, lung, and metabolic responses during progressively harder exercise. Stationary bicycles allow controlled workloads while clinicians monitor physiological responses.
Upright exercise bicycle: A stationary bicycle whose rider pedals in an upright posture similar to conventional outdoor cycling. Its posture makes it the familiar baseline form of stationary exercise bicycle.
Aerobic exercise: Physical activity that relies substantially on oxygen-dependent metabolism to sustain effort over time. Stationary cycling is commonly used to build or maintain aerobic capacity.
Magnetic resistance: A braking method that varies resistance by changing a magnetic field near a rotating metal element. Many stationary bicycles use it to adjust pedaling difficulty without friction contact.
Cardiac stress test: A diagnostic test that evaluates heart function under increased physical workload. A stationary bicycle can provide the graded exercise used in some cardiac stress tests.
Recumbent bicycle: A bicycle design in which the rider sits reclined, with legs extended forward to reach the pedals. Recumbent stationary models support the back and position the legs differently from upright bikes.
MET: A unit expressing energy expenditure as a multiple of the resting metabolic rate. MET values help describe and compare the intensity of stationary-bike exercise.
Friction brake: A brake that slows motion by pressing surfaces together and converting kinetic energy into heat. Some stationary bicycles use brake pads against a flywheel to create adjustable resistance.
Cardiac rehabilitation: A medically supervised program that helps people recover and reduce risk after heart disease or cardiac events. Stationary cycling offers a controllable form of aerobic exercise in supervised rehabilitation.