Boy, oh boy - of everyone who finds their way to this blog via search engine, 90% are looking for info on specific interval training regimens. So here you go:
Great stuff from an old school trainer in Europe. Nothing like the Tom Ivers programs, which may be a little too much for today's thoroughbreds, in the USA anyway.
This is a nice intro to the IT concept - but I would certainly recommend a heart rate/GPS monitor to keep things safe. Of course, you can get those from me, just let me know if you are interested-