Though the recumbent bike does not provide any strengthening benefits to the abdominal muscles, it is an efficient form of cardiovascular exercise, which can help you to burn calories and reduce fat throughout your body, including on your midriff. Less fat means your abs will be more visible, which can lend to a fit and aesthetically pleasing physique.
About the Abs
An integral part of your core, the abdominal muscle group -- the transversus abdominis, rectus abdominis and side obliques -- helps you to be stable, agile and powerful during both athletic and everyday movements. Developing your abs requires performing strength-training exercises that fatigue the muscles, such as Olympic barbell lifts, or traditional crunches, planks, bicycle crunches, reverse crunch and lying leg lifts. Maximize abdominal strength by training your abs at least three times per week with three to four different exercises each session.
Equipped with a bucket-style seat, the semi-reclined position of the recumbent bike takes pressure off your back, allowing for a comfortable cardio workout without any back pain. Though the body positioning used on an recumbent bike will probably not fatigue your stomach muscles nor cause any abdominal muscle growth, riding the bike can help you to reduce your overall body fat percentage. Harvard Health Publications reports that 30 minutes of moderately paced riding can burn between 200 and 300 calories, depending on your weight.