Ed at Work wrote:
But saying it "works" is a very hard thing to do with such a small sample size. Remember Ed is not actually improving which is how we generally tell if training is "working".
Also he does get injured. He takes whole years off at a time.
The reason Ed is not improving (year by year) is that he's at an age where natural physical decline is accelerating faster than any type of training can hope to overcome.
His training is "working" in that he's usually the fastest runner for his age as he ages.
I agree with Turbogeezer when he says you can reach 95% or more of your race potential off simple base mileage with regular short races being the only fast running. Not getting injured is the secret for older runners.