Popsugar Health & Fitness Under Armour 20-Minute Lower-Body Strength Workout This 20-Minute Lower-Body Strength Workout Targets Every Muscle From The Waist Down 30 August 2021 by Angelica Wilson View On One Page Photo 1 of 5 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Reverse Lunge Stand with your feet together, holding the medium dumbbells by your sides (one in each hand). Step one leg back, lowering into a lunge by bending both knees about 90 degrees, keeping good posture and abs tight. Return to your starting position, and repeat the same move on the opposite leg. Continue for 40 seconds. Rest for 10 seconds. Previous Next Start Slideshow Under ArmourDumbbell Workouts20-Minute WorkoutsHome WorkoutsLeg WorkoutsLeg ExercisesStrength TrainingWorkouts