Conventional weights are no longer necessary.
At the lower levels the weight of the rolling wagon acts as an aid, while at higher levels it acts as an overload. We can use it quickly and effectively for a great number of different exercises as well as the obvious great benefit of allowing the women to do pull-ups for the first time. Today, he proudly informed me he in now up to level seven which equates a standard pull-up. I asked him to show me his pull-up, the first he had ever performed. With almost no effort, he pulled up quickly above the bar.