I'm a Marine Reservist that recently hurt his knee. (lets just say i got fat and happy) I plan on going to OCS this summer but I'm so out of shape right now i don't think I could get a first class. I just started that Armstrong pull up work out and i am seeing improvments already. But my big problem is my run. I've never been a strong runner and this recent injury has taken back all the progress that I had origionally gained. Does anyone have any good training tips for running? I would like to get to a 20-23 min 3 mile.