Being relatively new to the scene of athletics coaching, I was intrigued by the previous reviewers claim that this book provides 'solid evidence' that a slight backward lean produces faster running. Unfortunately, this was based merely on observations by the authors that elite 400m runners tend to lean back towards the end of their race, and hence must be helping them run quickly. This is an example of the authors' failure to see what is really happening when they try to describe the biomechanics of running. At the end of a 400m race the athletes are slowing down, exhausted of energy and as a result losing their technique. The book follows the conventional notion that running includes a 'push-off' action, even though EMG studies have repeatedly shown the quads to fall relatively silent at the point at which push-off is meant to occur. The author fail to address this point, even though they present a graph that clearly shows it. If only they didn't discount the important role of gravity during running they would not get bogged down in unnecessary detail which results in them proposing erroneous theories such as hamstrings serving to 'push the whole upper body upwards and forwards' when in reality they simply pull the lower leg off the ground.
Some of the technical assertions in the book are correct (such as to not over-stride) and the physiology and strength training chapters are detailed and well presented, but the fundamental basis/model that the main chapters on running technique are built on is very much flawed (in my opinion) leading to overly-complicated analysis of what is actually quite a simple action once understood. I suggest anyone who wants to strip running down to its fundamentals and build a coaching programme on sound principles has a look at Romanov's 'Pose Method' which sees running as the result of evolutionary design and the natural forces we are subject to. I've yet to find anything to undermine these concepts.
Dr. Nicholas Romanov's Pose Method of Running and/or
Pose Method of Triathlon Techniques