Start with your feet directly under your hips. Step your right foot wide to the side, coming into a lunge. 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.
Complete 12-15 reps on each side. To make this more challenging, hold a light dumbbell at your chest and press it forward (away from your body) as you lunge.