Start standing with feet together, holding a dumbbell in each hand by your sides.
Take a controlled step forward with your left leg, lowering your hips toward the floor by bending both knees to 90-degree angles. The back knee should point toward but not touch the ground, and your front knee should be directly over the ankle.
Press your left heel into the ground, and push off with your right foot to bring your right leg forward, stepping with control into a lunge on the other side. That's one rep.
