William Kinnear is a Consultant Respiratory Physician at Circle Nottingham, Nottingham NHS Treatment Centre, Queen's Medical Centre Campus, Nottingham, UK and a Senior Lecturer in Sport Science at Nottingham Trent University. He studied at University College London and Westminster Hospital Medical School. He trained at the Brompton Hospital in London, Papworth Hospital and Addenbrooke's Hospital in Cambridge before moving to Nottingham. A Wellcome scholarship enabled him to spend a year at Erasmus Hospital in Brussels, developing his interest in respiratory muscle physiology. He worked as a consultant respiratory physician at the Queens Medical Centre in Nottingham for 25 years, setting up the regional non-invasive ventilation and sleep services. He introduced cardio-pulmonary exercise testing in the lung function laboratory and has published widely in the field of respiratory physiology. James H. Hull, PhD, FRCP, FACSM is a Consultant Respiratory Physician at the Royal Brompton Hospital, London, UK and Hon. Associate 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. He currently personally supervises over 250 CPET tests per year, as lead for the clinical unexplained breathlessness service at the Royal Brompton.