This exercise increases strength in the shoulders and triceps. The use of the Swiss ball actively engages the core.
Grab a pair of dumbbells and sit on a Swiss ball. Pull your shoulders back, tighten your core and raise the dumbbells just above shoulder height with palms facing forward and your elbows tucked close to your body.
Fully extend your arms overhead. Pause, and slowly return the dumbbells to your shoulders.
Be sure to use slow, controlled movements.
Make sure to focusing on pressing the dumbbells up, not out.