This is a way to increase your work load, endurance, strength, reps, etc. Mostly it is used on things like Pullups, chinups, situps, dips, etc. I was thinking of trying it on Pullups, situps, dips if anyone could explain the particulars. I am not sure how many days per week it is used nor am I exactly sure how the ladder is used. If anyone can explain this further I would appreciate it.