Hold each end of a long resistance band in your hands. Place both feet onto the middle of a resistance band and stand with them just wider than shoulder width apart. Stand tall, brace your core and avoid arching your back. Raise both ends of the resistance band upto your shoulders, level with your ears, with the palms of your hands facing forwards and your elbows in line with your shoulders. This is the start position. As you exhale, press both ends of the resistance band up and directly over your head by extending your arms with your hands almost meeting at the top of the movement. Think about initiating the push from your elbows as opposed to your hands. Slowly return to the start position inhaling as you do so. Repeat for the required number of reps (or time).