Incline Barbell Tricep Extension (Skull Crusher) What muscles do Incline Barbell Tricep Extensions (Skull Crusher) work? The Incline Barbell Tricep Extension (Skull Crusher) is an isolation exercise that primary targets your triceps. It’s a strength exercise that uses push force. How to do the Incline Barbell Tricep Extension (Skull Crusher) Benefits of the Incline Barbell Tricep Extension (Skull Crusher) Tips for performing the Incline Barbell Tricep Extension (Skull Crusher) What equipment is needed to perform Incline Barbell Tricep Extensions (Skull Crusher)? What type of exercise is the Incline Barbell Tricep Extension (Skull Crusher)? How many reps you should do for Incline Barbell Tricep Extension (Skull Crusher)?