Why you need them: Like the name says, presses work your shoulders, which helps create that tapered look that gives you the illusion of a smaller waist.

The breakdown: Start standing tall with your feet in a staggered stance. Grab your weights, and with your palms facing out, bring them to chin level. Keep your arms slightly forward as you exhale, raising your arms up. Inhale as you slowly bring your arms back to your starting position, making sure that you keep your abs held tightly the entire time.