Chin Up Max (assist)
Maximize every minute you spend on the chin-up bar. This tool gives you the right amount of adjustable support to help you strengthen and train muscles as you work toward unassisted moves.
This piece of equipment can be used with P90X, Asylum, P90X2, or any workout involving pullup exercises.
They didnt have this product when I was first starting out with P90X. I used the chair technique and then I used lifting bands that can be purchased at any local health and fitness speciality store.