The brachialis is the often-overlooked muscle between the biceps and triceps. Training your brachialis is a great way to help "project" a massive arm. Why? Because as the brachialis develops, it pushes your biceps and triceps further away from one another, making for a wider-appearing arm.
The standard hammer-grip curl is good, but I prefer the cross-body variation shown here. Grip the dumbbell as hard as you can throughout the rep.
The purpose of this column is tri-fold. Purpose number one is as a "refresher course" for seasoned lifters. Sure, deep down, you may know this stuff, but it's been so long since you first read about it that you've forgotten the rationale behind the subject matter.