The Scissors Lunge exercise works your shoulders, triceps, butt, quads and calves.
Holding a dumbbell in each hand, step back with your right leg into a lunge, bending both knees 90 degrees. At the same time as you lunge, raise your left arm forward to shoulder height, and your right arm behind you with thumbs up. Try to keep your torso facing forward. Do ten to twelve reps, alternating legs. Do three sets total.