Step up and grasp bar with wide overhand grip. Step down onto assistance lever or platform.
Pull body up until neck reaches height of hands. Lower body until arms and shoulders are fully extended. Repeat.
Some assisted machines require you to kneel on platform instead of standing on bar. If no assisted machine is used, assist as needed by allowing training partner to pull feet up behind legs or push self up with legs on elevation. Range of motion will decrease if grip is too wide.