Popsugar Fitness Workouts Best Exercises For Stronger Legs If You're Mesmerized by Simone Biles's Legs, Try These 17 Muscle-Building Exercises August 16, 2019 by Tamara Pridgett View On One Page Photo 7 of 21 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 7 Step-Up Find a step or a bench that, when you place your foot squarely on it, your knee is at a 90-degree angle or larger. Step up with the right foot, then the left, bringing both feet completely onto the bench. To return to the starting position, lead with the right foot to step down to the floor, then the left, until ending with both feet on the ground. Previous Next Start Slideshow WorkoutsStrength TrainingSimone BilesTrainer TipsGIF ExercisesLeg Exercises