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A Stationary Bicycle Provides a Low-Intensity Aerobic Workout A stationary bicycle, also known as an exercise bike, is a low-impact aerobic exercise. This kind of bike is popular among people who are seeking an exercise that is cardiovascular or for those undergoing physical therapy, like knee rehabilitation. All forms of cardio exercises burn calories and build muscles. The muscles you work out on a stationary bike will vary depending on what type of workout it is. Aerobic Exercise Whether you prefer to ride on a treadmill or out in the open, an ex