Try this exercise using a kettle bell and a balance ball. Begin by holding a kettle bell in your right hand. Clench your abs tight and proceed to sit down on a balance ball with your legs in V position. Continue to engage your abs as you curl the weight to your shoulder as you keep the handle straight. The bottom of the kettle bell will point towards the ceiling when it reaches the level of your shoulder. Now lower the weight to your side and repeat the entire motion for 2 sets of 12 repetitions (on each arm) to start.
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