I think that it absolutely will work for just about anyone who puts the effort in. You may also take confidence in knowing that since we completed the initial program, my friend has continued working out with me and alone. He has continued the maintenance mode, and in doing so, he has more than doubled his initial Vert Shock results.
Let me stress this once again: you have to put the work in. Your vertical is not going to increase by magic or if you are half-assing it. Earn that sweat equity, though, and you will definitely elevate higher.