This will be brief, as I can't find my copy of Daws' book, "Running Your Best" (1985), nor can I find one locally I can peruse at will. Daws was a local runner, who made the US Olympic team in the marathon. He was not gifted with a high maximal oxygen uptake, but made up for that by training exceptionally long and hard, to be able to run at 95% of his maximal heart rate for more than two hours. This is not unlike Derek Clayton, who lowered the marathon world record from 2:12 to 2:08 (which stayed the record for almost a generation) and who was also known to train very long and very hard.
My recollection of this training manual was that it was very specific as to the workouts, advocated high mileage and had a great deal of very hard running. It is worth mentioning as an alternative method, but not one I could recommend.
I should also point out, to be fair, that I knew Daws and we didn't like each other. I believe it started when I beat him in a race (I was a rapidly-improving teenager, he was more than a decade past his prime - and it was a short race) and afterward, when he told someone, "Give me a guy who's running 120 miles per week and I'll do the rest (to make him a champion)" and I retorted, "Yeah, tie him to a chair for a couple of days, because he's overtrained."
I've grown up a bit since then and appreciate the hard work he did and his willingness to encourage others.
6 hours ago