SETUP: Use an upright bench and load two dumbbells at shoulder level, with your palms facing forward.
START: Hold one of the dumbbells slightly below 90* (but don’t rest it on your shoulders), and press the other dumbbell straight up and down.
FINISH: Now switch sides with the same approach.
TIP: One of the hidden benefits of this exercise is the constant tension placed on the non-working arm. This is why you shouldn’t let it rest on your shoulder as you press the other side; we WANT that tension, fight it!