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A Stationary Bicycle Provides a Low-Intensity Aerobic Workout Exercise bikes, or stationary bikes, provide an easy and low-impact workout. This kind of bike is popular among those who want an exercise for their cardiovascular system or are taking part in physical therapy, for example knee rehabilitation. All forms of cardio exercises help to burn calories and build muscles. The muscles that you exercise on a stationary bike will vary depending on what kind of workou