Military press

Grab the barbell with your arms by the side of your body, lift it from the rack and take a step backwards.
Stand with your feet shoulder-width apart and the bar resting on your chest. Lean your head and shoulder a little bit backwards.
Breathe in and flex your core.
Breathe out and push the bar in a straight line towards the ceiling, passing in front of your face.
When the barbell has just passed your head, angle your head and shoulders upwards so that your head is directly below the bar when your arms are straight.
Pause at the top.
Breathe in and slowly lower the barbell for 2-4 seconds, lean your head and shoulders back as the barbell lowers back to your chest.