PREFACE: In 2015, we partnered with the biomechanics lab at the University of Colorado at Boulder to deconstruct the vertical wall run technique. Wall runs by 20 parkour coaches and athletes from various APEX schools were analyzed using wall-mounted force plates and high-speed cameras set up at APEX Boulder. Special thanks to Amos Rendao, Dr. Rodger Kram, Peter Lawson, Bryant Pham, and all the APEX athletes and coaches who took part in the study. — Ryan Ford