Hill sprints are the salad-tossing of running. When you’re doing gentler running (or ‘jogging’, to use a loathsome term), you can zone out and imagine you’re doing something else. But when you’re running hills, you know you’re running hills. When ‘jogging’, you can let your mind float and see where it goes (mine normally ends up on NBA games and what’s recorded on my Sky+. How bland). When sprinting, however, pain and fatigue is front and centre, slapping you in the face and screaming “This is your pain, right here!”*.
*Think Fight Club, Tyler Durden, lye burns