I've just look through the Treat about "resistance running". But I think it's not exactly what I'd like to discuss.
What about up-hill running as a form of sprint training.
In my oppinion, there it is much harder to run up hill so that it could be useful for gaining more speed. On the other hand, you will step more slowly, as a result you loose speed.
But in combination whit down-hill running with fast steps, up-hill runs would probably work!??
So what do you think about or have you any experiences?