Start by sitting up straight, feet flat on the floor, hands in front of your shoulders, elbows bent, palms down, with closed fists.
Straighten your elbows; slowly push your arms down, fists just in front of your lap. Slowly bring them back up toward you shoulders and push down again.
*Remember to keep the muscles tight throughout the exercise.
Start with 3 sets of 8 to 12 reps.