Popsugar Health & Fitness Trainer Tips 10-Minute, At-Home Ab Workout From The Sculpt Society This 10-Minute Ab Workout, Done Entirely in a Plank Position, Will Transform Your Core 20 November 2019 by Colleen Travers View On One Page Photo 4 of 4 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 4 Thread the Needle Start in a side plank on your right elbow (no slider or towel needed). Thread your left arm through the open space beneath your waist, as you rotate your shoulders and hips slightly toward the floor. Make sure to move from your shoulder, squeezing the side oblique muscles with each rep while maintaining proper form in your plank. Do eight to 12 reps before switching sides. Previous Next Start Slideshow Trainer TipsHome WorkoutsAb Workouts10-Minute WorkoutsStrength TrainingWorkoutsAb Exercises