Lift: Raise a dumbbell overhead with elbows pointing forward, bent at 90 degrees. From this position extend at the elbow until just before full extension. Lower slowly and under control. Do not allow the elbows to flare out to the sides when performing this movement.
Caution: Be careful with the weight overhead - make sure you can safely handle the weight and do not push failure.
Muscle Roles in tricep extension - standing, dumbbell