ONE Arm Lat Pull-Downs:
Working the Lats, the back BRA BULGE area.
Hook an appropriate attachment to a high cable. Your palm will start facing away from you. Pull the handle down to your side along with your elbow while rotating your wrist. OR- you can pull the handle down with no wrist rotation. It's all what you prefer and what feels best to you. I do 12-15 reps. on each arm. 3 times.
When you finish a set of these how about some Lunge-Knee-Hops to spike your heart rate?! I showed this plyo move last week. It's a goodie!