Choose an appropriate resistance matching your fitness level. Grasp a pulley (rope) with an overhand grip. Take a shoulder-width stance; keep your torso upright and your pelvis is in a neutral position.
Contract your upper trapezius muscles (lift your shoulders); breathe out as you go up; breathe in as you go back to the starting position. Repeat as required.
Make sure you keep your torso straight without arching your lower back. Your pelvis is in a neutral position.
As you start, choose an appropriate resistance to master the technique well.