When it comes to building big arms, the triceps don’t get their just deserts.For most people, it’s all about the biceps.Well, ironically, the biceps constitute much less of your upper arm size than the larger triceps.This is why building big triceps is one of the little-known “secrets” to building big arms. So, let’s start with a quick overview of the triceps muscles and then dive into how to train them effectively.