dumbbell kickbacks on exercise ball

Sit on an exercise ball with your feet flat on the ground and your back straight. Hold a dumbbell in each hand with your palms facing inwards and your arms bent at a 90-degree angle. Extend your arms straight back, squeezing your triceps at the top of the movement. Pause for a moment, then slowly lower the dumbbells back to the starting position. Repeat for the desired number of repetitions.