Fred Zalokar wrote a story about his Berlin marathon victory:
http://www.strawberrycanyontc.org/data/news.html#092610In that race, he ran sub 6 minute miles and won the senior division by
four minutes. An amazing accomplishment. In the story he describes
his preparation. What work! Up to 140 miles per week and 3x speed
sessions per week. Shows the great success was not an accident. Fred
earned every bit. I find it inspiring and instructive.