We do this stretch where we put our back against the wall and we have a partner lift up one of our legs up as far as possible. The end goal is to be able to put our toes against the wall with our leg being straight up. Our sensei looks at me the other day and says "I want your toes to be touching the wall by August!" Ha! My leg rests on a short person's shoulder right now, but what he says I must do, so now I get my mom to help me stretch at home now. Machines do not do anything you can't to by yourself or with a partner.