This is a great exercise for the triceps that are often overlooked and the older we become if not used, we can get bat wings. I work on my triceps everyday doing different exercises. This is one of them. Simple yet very effective.
Stand holding a dumbbell in each hand and step your right foot forward bending the right leg into a lunge. Keep your back leg straight and bending forward at the hips. When your arms are parallel to the floor straighten your arms kicking the dumbbell behind you. Then reverse to return to the start position. Repeat on the other side alternating. Do 2-4 sets 20 reps.