Popsugar Fitness Workouts 15-Minute Ab Workout I'm a Trainer, and This Is the Ab Workout I Do For a 6-Pack December 6, 2018 by Tamara Pridgett View On One Page Photo 6 of 8 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 6 Plank With Shoulder Tap Begin in a plank variation with your feet slightly wider than your hips for added stability. Keeping your torso stable, bring your right hand to your left shoulder, then return your right hand back to the mat. Bring your left hand to your right shoulder and return it to the mat. This counts as one rep. Complete 10 reps. Previous Next Start Slideshow WorkoutsStrength TrainingBodyweight ExercisesBodyweight WorkoutsAb WorkoutsCore ExercisesTrainer Tips15-Minute WorkoutsAb Exercises