Performing the: A Step-by-Step Tutorial Barbell JM Bench Press
Next, lift the barbell off the rack and hold it straight over your chest with your arms fully extended.
Slowly lower the barbell towards your forehead by bending your elbows and keeping your upper arms stationary, this should resemble the motion of a skull crusher.
Just before the barbell reaches your forehead, shift your elbows back slightly so the barbell is now moving towards the top of your head.
Pause for a moment, then press the barbell back to the starting position by extending your elbows and flexing your triceps.