I have really been trying to follow Phil Maffetone training principles lately and have been trying to absorb anything that I can find about it. It all came about reading Lucho's blog where he talks about it quite often.
This lead to reading this book which I really seemed to agree with what Phil has to say, it just makes sense in my mind. Since reading this book I started wearing a heart rate monitor and minding how my body feels when running. I started doing this about the beginning of July. Since then I have dropped my 145bpm heart rate pace on flat ground from 8 mins per mile to about 7:20 mins per mile. I am very interested to see where this goes.
Ben Greenfield just did a great interview of Phil. You can listen to it by clicking here.
Let me know your thoughts about this training philosophy. Here are a couple more links with more information.
Mark Allen on Heart Rate Training
Want speed? Slow down!