Anyone do any running with a pack on? I like to do it but it seems to require a different style as the rhythm is different from your normal pace. Also, I have not done it with a quality pack to know how it feels. I have done a lot of it with an ALICE pack frame and end up wearing a hole in the middle of my back and on kidney area. I have lashed weights on just the frame. What methods do you guys use to achieve this as far as pack style and what do you use for weight? One of my buddies uses books.