For Strong, Powerful Legs, Trainers Love These 10 Muscle-Building Dumbbell Exercises

Side lunges work your quads, hamstrings, and glutes, said Sylvia Nasser, a NASM-certified personal trainer. If you're new to this move, master it with no weight first (as pictured), then add one or two dumbbells.

• Start with your feet directly under your hips. Hold one dumbbell in front of your chest or two straight down in front of your, keeping your chest up.
• Step your right foot wide to the side, coming into a lunge with your left fingers touching your right foot. Your right knee shouldn't go beyond your right toes. Keep your chest lifted and your weight in your heels.
• Push into your right foot to return to standing, then lunge sideways to the left. This completes one rep.