James H. Hull, PhD, FRCP, FACSM is a consultant respiratory physician at the Royal Brompton Hospital, London, UK and Hon. Professor at the Institute of Sport, Exercise and Health (ISEH), UCL, London. His interest in exercise testing started with an undergraduate degree in exercise physiology at St George's Hospital Medical School with Professor Brian Whipp. He later completed a PhD in vascular physiology and was then awarded a National Institute for Health Research Clinical Lectureship, during which he spent time at UCLA, California developing expertise in clinical exercise testing.