Add Yahoo as a preferred source to see more of our stories on Google. Basic ab exercises like crunches and situps are important foundational exercises, but once you've mastered them, it's time to ...

Today, ab workouts are on the agenda—so it’s time to hit the mat and get started, right? Not necessarily, how about trying a “Standing Ab Workout” for a change? There are great ab exercises you can do ...

Plus, easy variations to make them more or less challenging.