Adjust the seat of an overhead press machine so that you're able to extend your arms at the top of the range of motion and can lower the handles down to your shoulders without the weight resting on the stack. Begin seated holding onto the handles with your hands just outside your shoulders and your palms facing forward. Contract your delts and extend your arms to press the handles straight up until your elbows are extended but not locked out. Slowly lower the weight back to the start position.