This Arms and Abs Workout Will Leave Your Upper Body Sore For Days

The dumbbell bench press requires core activation to help you drive the arms above the head.

• Start laying on the floor or a bench with a dumbbell in each hand.
• With the elbows out at a 45-degree angle, press the arms above the head until the arms are straight above the head.
• Return to the starting position.
• Repeat for 10 reps.