Holding a pair of dumbbells, stand with your legs together. Perform a bicep curl by bending your elbows to bring the weights up to your shoulders.
Lower your arms as you take a large step out to the side with your right foot, lunging toward the floor. Make sure your right knee does not extend past your toes, and keep your left leg relatively straight.
Push off through your right foot to return to standing, and perform a bicep curl to return to the starting position. That's one rep.