This exercise makes for a great finisher after a shoulder workout. It'll hit all three heads of the delts. The key here is continuous tension, one of the key mechanisms for muscle growth.
You won't need much weight for this one. We're going for time under tension and burn.
Perform a lateral raise, followed by bringing the dumbbells together in front, then a front raise from that mid-body position. Now reverse the movements. That's one rep. If you do it right, you'll never lose tension on the muscles.
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.