I was going to start a new thread, but figured i'd just use this one. I noticed when i started dragging weight with my dog that when I used lighter weights it was more of an intense workout as she would sprint with the weights attached to her harness, when i added weights the intensity slowed down and she would merely walk. Now im thinking that both ways would work, alternating days with the light weights doing sprints and the heavier weights walking. Just curious how some of you guys do it, do you slow walk or sprint...