Popsugar Health & Fitness Workouts Plank Ab Workout I Trained With J Lo's Trainer, and Now I Know the Secret Behind Her 6-Pack 21 September 2018 by Tamara Pridgett View On One Page Photo 4 of 4 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 4 Circuit Two: Elbow Plank With Side Step Start in an elbow plank and alternate stepping your legs to the side, keeping your toes off the floor. To modify, tap your toes to the floor. Complete 10 reps. Previous Next Start Slideshow 15-Minute WorkoutsBodyweight WorkoutsIntermediate WorkoutsCore ExercisesAb WorkoutsCelebrity TrainersPlankStrength TrainingWorkouts