Stand upright with your knees slightly bent and your feet shoulder width apart.
Step2
Hold the bar in front of you with an overhand grip and your hands slightly wider than shoulder width. Let the barbell hang at arm's length with your shoulders in a relaxed position.
Step3
Shrug your shoulders up as high as possible and pause briefly at the top.
Step4
Slowly lower your shoulders back to the starting position. Repeat.
Tips & Warnings
This can also be done with dumbbells.
For more of a challenge, add weight to barbell.
Do not bend your elbows as your lift your shoulders.