I'm ashamed to admit this, but I can't do a single pull-up. I'm going on a physically demanding course this October; a course which will require me to do several pull-ups. I can crank off dozens of push-ups and sit-ups. I can run fairly well, bench a decent amount of weight and can nearly max out a pull-down machine, so I don't believe that I'm a weak person. I'm a bigger guy (6'0, 240ish lbs), so I imagine that's a big part of it. They say that to get good at something, keep doing it. That becomes quite a paradox when you can't even do one! I've been using TRX rope exercises and partner assisted pull-ups to develop. I'm also in the process of dropping some weight. My goal is to do three unassisted by August, and seven before my course starts in October. Can anyone think of any other methods or experiences that could help?