Popsugar Fitness Workouts How to Build Rock-Solid Abs A Fitness Trainer Recommends These 9 Things For Rock-Solid Abs July 29, 2018 by Jenny Sugar View On One Page Photo 4 of 9 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 4 Single-Leg Russian Deadlift Single leg deadlifts require your abs for stabilization and balance, which means they're working really hard. Previous Next Start Slideshow WorkoutsBelly FatWeight LossAb Exercises