Acknowledgments

I owe a debt of gratitude to a large number of very special people who have assisted with the creation of this book.

Without the assistance of my great friend and colleague Walt Reynolds, this book would never have been possible. Almost every week for over two years, Walt and I discussed running form in great detail over lunches of raw fish, miso soup, noodles, and scalding-hot green tea. It was Walt who introduced me to the unique form terminology used in this volume, including the all-important SAT (shank angle at touchdown), MSA (maximal shank angle), ROS (reversal of swing), FAT (foot angle at touchdown), and the incredibly important golden ratio (ROS/MSA), which determines which runners will be found on the podium at the ends of elite competitions or—in the case of non-elite running—which runners are most likely to be injured as they pursue their running goals. It was Walt who made the amazing discovery that, with just one exception, world-record holders at distances ranging from 100 meters to the marathon all shared a common SAT. Walt found that Usain Bolt (world-record holder for 100 meters) and Dennis Kimetto (world-record holder for the marathon) land on the ground with their legs in very similar positions, leading to the discovery that there is an optimal way of striking the ground. Walt also created an important new definition of running economy: the velocity a runner can attain in relation to the impact forces he creates with the ground. Walt is currently coaching Mark Otieno, a sprinter who holds the Kenyan records for 100 and 200 meters. I consider Walt the most knowledgeable running form expert in the world, and you will find his concepts and recommendations throughout this book.

I am also indebted to the elite Kenyan distance runners I am currently coaching and managing, who utilized both the video-form analysis described in this book and also the recommended form drills to improve their performances significantly. Cynthia Limo (silver medalist in the 2016 IAAF World Half Marathon Championship and first-ranked road racer in the world as ranked by ARRS in 2016), Mary Wacera (world silver and bronze medalist in the 2014 and 2016 IAAF World Half Marathon Championships), Monicah Ngige (two-time winner of the Cooper River Bridge Run 10K and champion of the 2017 Monterey Bay Half Marathon), Mary Wangui (victor at the 2017 Tulsa Run 15K), Iveen Chepkemoi (first in the 2017 AK Sotik Cross Country meeting in Kenya), and Gladys Kipsoi (winner of the 2017 Pittsburgh Half Marathon) all employed the techniques described in this book to improve their performances and decrease their risk of injury.

A number of sub-elite runners I am currently coaching were also instrumental in improving the book. Dr. Larry Kurz, Rabbi Lawrence Kelemen, Yaakov Nourollah, Dr. David Rosmarin, Charlie Morrow, Meir Kaniel, Paul Gray, Rabbi Elie Karfunkel, Rifky Karfunkel, Yisroel Gelber, Yosef Weissman, and Omeed Hakimi have all utilized the techniques described in this book to run faster while keeping the injury bug at bay. I owe an extra-special debt to Larry Kurz, Rabbi Kelemen, and Yaakov Nourollah for their incredible faith, friendship, and unending support.

I am also extremely grateful to my editors at Human Kinetics. Anne Hall, Caitlin Husted, Michelle Maloney, and Tom Heine worked tirelessly to bring this book to fruition and have provided perfect guidance and assistance. They were patient and supportive always, even when the time devoted to coaching and managing my elite team resulted in long writing droughts. My editors’ vast skills at improving the writing found in this volume and at pairing text with essential photos, figures, and illustrations have improved this book immeasurably.

I have also been helped enormously by the research carried out by other scientists. Notably, the investigations conducted by Peter Weyand at the Locomotor Performance Lab at Southern Methodist University, Daniel Lieberman of the Department of Human Evolutionary Biology at Harvard University, and Irene Davis at the Harvard Medical School and the Spaulding National Running Center have provided key insights concerning vertical and horizontal propulsive forces during gait, the effects of running form on impact and propulsive forces, and the interactions between various aspects of running form and both performance and the risk of injury.