TRICEPS - Standing One Arm Overhead Dumbbell Triceps Extensions
Grab hold of a suitable weight dumbbell and keeping your core tight, your torso straight and feet at shoulder-width, raise it above your head. The arm should be fully extended and your palm is facing forward. This is the starting position.
Commence the movement by bending at the elbow to lower the dumbbell behind the neck. The elbow acts as a hinge joint - the upper arms should remain stationary and the movement comes only from the forearms. You should feel a large stretch through the triceps. Inhale through the movement.
When the elbow have reached its maximum range of motion, reverse the movement by pushing up through the triceps and extending the arms back to the starting position, exhaling as you do.