Lying tricep extension on the Swiss Ball
1) Begin with your back on the Swiss ball and your legs as a base of support out in front of you.
2) With Dumbbells, bring your hands next to your ears with your elbows in tight at your sides and raise your elbows towards the ceiling. This will be your starting position.
3) Keeping your elbows in tight, extend your arms at your elbows bringing the weight above your head, then return to the starting position and repeat this motion.