It’s important to develop all three heads of this muscle group, because if one is lagging, it will be painfully obvious. In most cases, the medial and posterior deltoids need the most work because the anterior deltoids get worked pretty intensely with proper chest training. The other two heads don’t, however. Here are the exercises I recommend focusing on in your shoulder training: Seated Barbell Military Press or Standing Barbell Military Press Seated Dumbbell Press or Arnold Dumbbell Press Dumbbell Side Lateral Raise or One-Arm Dumbbell Side Lateral Raise Rear Delt Raise (Bent-Over or
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