"While the ingenuity is cool, all of this is so unnecessary. Pec flys? C'mon man.  Lat pull downs with a 3 lb log? And then you add a pulley system to it? Much less work. People, the basics are a tried and true method: pull ups, push ups, Squats, and sprints. Once those are easy, add weights in a backpack, dip belt or whatever! Much better results than a pulley system with 3 lb logs. "