Popsugar Health & Fitness Workouts How to Strengthen Your Abs Get Rock-Solid Abs With These 15 Strengthening and Toning Exercises 28 August 2018 by Tamara Pridgett View On One Page Photo 14 of 15 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 14 Forearm Plank Hip Dips From an elbow plank, slowly rotate the spine to lower your left hip to just above the floor (about one to two inches from the ground). Come back to elbow plank. Now lower the right hip toward the floor. This counts as one rep. Previous Next Start Slideshow Trainer TipsBodyweight ExercisesCore ExercisesStrength TrainingWorkoutsAb Exercises