Best Ab Exercises is not like most abdominal workout books out there--in fact, it does not contain a single traditional "crunch" or "sit-up" type exercise.
Indeed, the weakness in many workout routines that target your core is that a lot of those exercises work your stomach in near isolation. This is nothing like the way your abdomen and lower back operate in real life.
In a real-life situation, your core muscles work with other major muscle...