In this lesson you will learn how to do triceps extensions. When we talk about triceps extensions, we usually mean lying triceps extensions with an EZ-bar, a triceps bar or a barbell. However, this exercise can also be done standing, sitting or with a dumbbell. There are 2 variations of the lying triceps extension, over the head and behind the head. In the over-head variation you keep your upper arms 90° to your upper body and move your barbell towards your forehead. In behind-the-head triceps extensions you lower your bar behind your head, towards the bottom of your bench. This variation also trains the shoulders and the back muscles. What's always consistent, is that you keep your arms parallel and your elbows still. Find more triceps extensions at weight training main.