Grasp the dumbbell with an overhand grip, with your thumbs on the outside. Be sure
to lock your wrist during the exercise.
Keeping the elbow with the dumbbell pointing straight up and bent forming a 90 degree
angle with your arm. The other hand should be at your waist for support and or
balance. Extend you arm straight up until you are fully extended.
Hold for 2 seconds, contracting the triceps muscles.
Slowly return to starting position.
Tips
Do not allow your elbow to rotate outwards. Keep it as stationary as possible during
the full range of motion.