Has to go to John Donodeo of Regis High School in New York City. I swear to god, this guy has no idea what he's doing and he's been the track coach there for 20 years (at least that's what he says when someone has the balls to question his training methods). EVERY SINGLE DAY is an interval workout -- Mondays will be 8 x 200; Tuesdays are 8 x 400; Wednesday may be "distance," i.e., some sort of ladder involving 600s; and Thursdays are back to 200s again.
Oh, and during XC, we NEVER do intervals. All runs are either 4 or 6 miles "hard" -- so of course everyone races them.
Unbelievable. Very, very few runners run all four years of high school and his teams never really amount to much of anything. Every now and then he'll get a runner or two who clocks around 1:56/4:20-low, but that's it. The end result is invariably a bunch of injured burnouts who quit at 17...