When I started my all track training program one reason was to avoid doing things that make my quadriceps feel like rubber. I though that by eliminating hills and cutting back on distance I would solve all my problems.
I was wrong.
What I've discovered is that running hard is at least part of the problem. Doing nothing more than running four hard 220s is enough to give me rubber quadriceps for a few days.
I think eliminating the hills and running only short distances has been a good move and I'm not planning on going back to the old way of training. But what I've to work on now is being able to run hard and not having it take such a toll on me that I feel it for days after.