i heard of it a long time ago but can't remember how to do it. i could lift the chair but my hubby couldn't cause of the way we're built. i think you put a chair against the wall, bend at the waist over the chair with your forehead against the wall & try to lift the chair. hubby tried it today & was able to lift the chair so we're doing something wrong, what is it? he dosn't remember putting his head against the wall but i do.