Advantage: Incline Skullcrusher

To isolate the winner, look at arm position relative to your head. During the incline skullcrusher, your upper arms are high and above your head. During the decline skullcrusher on the other hand, your arms are more directly in front of your body, which ends up being the determining factor. Whenever you?re hitting the triceps with your arms at your sides, you?re targeting the lateral head more than the medial or long heads. Whenever you raise your arms overhead or three-quarters overhead, you better isolate the long head. The decline skull is a great exercise and one that should definitely be incorporated into your routine, but the incline skullcrusher is your winner whenever your goal is the meaty portion of the back of the arms.