This dumbbell press variation can be performed at any pressing angle, from decline to overhead. It builds shoulder and elbow stability due to the extra time keeping one arm locked out.
Even though there's an equal amount of load on each side, the pressing arm will track away from the midline of the body, creating a slight anti-rotation component.
How to Do It
Press both dumbbells them up.
From there, lower one dumbbell and press it back up as your opposite arm stay locked out at the top.
Alternate back and forth between arms until all reps are completed.
Over the last few years it seems that just about every "in the know" performance coach has discussed the conjugate method and why they find it to be the most effective way to train an athlete. By now I think we all know the definition of conjugate or concurrent periodization and how it involves simultaneously trying to raise multiple qualities.