Tricep extensions are exercises to give your arm some definition. The tricep muscle got its name because it has 3 attachments and that is also the reason why it looks so good when you develop them. It really sculpts the arm. There are many ways to perform this exercise. You can do it lying down, standing up, with a bar, with a rope and even with a dumbbell. The main one way are concentration on this time is a standing position, pressing a rope or bar down.