Chin Ups

Setup
Step up and grasp bar with underhand shoulder width grip, then hang with body and arms straight and knees bent, with lower legs behind.
Movement Instructions
Bend elbows and pull body up until chin is hand height and elbows are to the sides. Lower body until arms and shoulders are fully extended. Repeat.
Comments
Do not rock or kick legs to help movement with momentum. For increased difficulty weight can be placed on dip belt or dumbbell can be placed between ankles.