Inhale, open your arms and chest, and slowly lower the weights in a semicircle arc out to the sides of your chest. Do not let your arms lower farther than parallel to the floor, or you risk straining your bicep tendon. Now, exhale and raise the weight, again in an arc, back up to starting position, and perform a crunch with the weights above your chest. Lower your body back into starting position. Repeat. This version of the Dumbbell Fly allows you to target your core as well as your chest.