Yes the debate and the marketing are awfully rhetorical and generally lacking a good empirical base. We have no delusions about answering all of the complexities of the question(s) in a single study. We will begin to answer one piece of the puzzle. I've been a researcher for a long time and I realize how difficult it is to change people's opinions with or without convincing data. We will attempt to show, for a given type of well researched interval training, whether HR-based, or Power-based methods result in significantly different Vo2, LT, or TT outcomes. We determined that to be the best place to start the investigations because interval training is really the only type of training that has received good emprical support in the scientific literature. I have no vested interest in either technology being determined superior to another. I own and use both power and HR devices. They are fun, I like the data, but I really don't know that I am a better cyclist because of the use of either of them. And more importantly, I know that extrapolating from my own personal experience to draw conclusions about devices and people in general, is just about the worst form of science!