How to Use an Ab Roller: 10 Steps (with Pictures) - wikiHow

Ab rollers are super easy to use and can be surprisingly effective. If you stick to a routine, your ab roller will help strengthen your abdominal muscles and gradually improve flexibility. So what are you waiting for? All you need is a

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How to Use an Ab Roller: 10 Steps (with Pictures) - wikiHow

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How to Start an Ab Workout: Routines + 9 Top Exercise Choices