2A One-Arm Incline Dumbbell Press
Set an adjustable bench to a 30-45-degree angle. Grab a dumbbell in your left hand and lie back against the bench, resting the weight at chest height and extending your right arm straight out to your side. Press the dumbbell straight overhead. Perform reps for 30 seconds straight, and then repeat on the right arm. Rest 30 seconds. Then go on to the stepup.