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The main reason to choose a recumbent bike over an upright bike is for safety and/or comfort. In cases where balance is an issue or if the rider is dealing with back, hip and knee pain, a recumbent bike may be a better option.he main reason to choose a recumbent bike over an upright bike is for safety and/or comfort. In cases where balance is an issue or if the rider is dealing with back, hip and knee pain, a recumbent bike may be a better option.
However, scooting closer to the pedals, which place your knees at a bent angle, help work the lower abdominal muscles well. The recumbent bike also builds the quadriceps. These are the muscles that are along your upper thighs. The quadriceps are large muscles and this benefits your body and the aesthetics of your legs. While pedaling the recumbent bike, your upper leg is engaged and moves up and down, which effectively works these muscles.