Instructions
Holding a dumbbell in each hand, sit on a bench that has a back support. Place the dumbbells upright on top of your thighs. Raise the dumbbells to shoulder height one at a time using your thighs to help propel them up into position and rotate your wrists so that the palms of your hands are facing forward. Keeping your upper back against the back support, push the dumbbells up overhead until they are almost touching each other. Lower back down to your shoulders with control, then repeat for the desired number of repetitions.
Tips
This exercise can also be done without a back support.