This is an exercise for trapezius strengthening.
1.Stand on the floor with your abs drawn in and your back straight.
2.Grasp a barbell with a grip a little wider than shoulder width at arms length.
3.Drop your shoulders as much as possible to start.
4.Raise your shoulder as high as possible.
5.Pause for a moment at the top and then return to starting position in a controlled motion.
Do not arch your back at all during the exercise.