I think that George's point is that calling yourself a "tramatologist" doesn't mean a thing. I study trauma too...but that doesn't make my review of a heart-rate training book any more valid. My review was based on facts. The book isn't that great...for the reasons I gave. I can even be more specific about my reasons. Note: saying it is "fun" and "informative" means absolutely nothing...just like saying, "I'm a tramatolgist." (sic) And that would be...a MD? PhD? BA? A mail-order degree? Think about it... The book isn't terrible and I'd recommend going to the library to check it out if you're looking for a cursory introduction to heart-rate training...but I wouldn't buy it. By the way, Sally's book isn't that good either.