I am not sure about weights, but i know there was a mixup of our workouts when i ran track and cross country. Seems like if we had a heavy day of sprints (well, 400m runs back to back to back with a walking lap in between for us distance runners), we would do just a long run the next day (say 3-4mile loop). Same thing the day after a race. We would do our warmup and then hit the road for a few miles of easy pace. Something about the buildup of acid (lactic acid maybe? can't remember) in your muscles. The long run would break down the buildup of acid in your muscles after a hard race or heavy practice. I can't remember the details as it was back in the early 90's. Maybe this thought process has changed since then. I would think there are similarities in all physical activity though. Maybe one day low reps/heavy weight, the next day less weight/more reps? I am sure someone could chime in with better knowledge then me.
