Stand facing fixed horizontal bar at neck height. Grasp bar with wide overhand grip. Position feet forward on floor, slightly in front of bar.
Lower body under bar until arms and shoulders are fully extended. If necessary, use minimal assistance of lower body to control descent, allowing knees and hips to bend, keeping flat on floor. Pull body up until chin is just above bar, again with minimal assistance from legs. Repeat.
If lower body is used for assistance, Hip and Knee Extensors muscles are utilized. Back extensors may be activated minimally as stabilizer through spine. Range of motion will be compromised if grip is too wide.
Resistance can be reduced by pushing with legs more or using assisted machine.
Standard Pull-ups or assisted Pull-ups with partner can be performed for greater challenge.