RT Journal Article SR Electronic T1 How can global physical activity surveillance adapt to evolving physical activity guidelines? Needs, challenges and future directions JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 1468 OP 1473 DO 10.1136/bjsports-2020-102621 VO 54 IS 24 A1 Richard P Troiano A1 Emmanuel Stamatakis A1 Fiona C Bull YR 2020 UL http://bjsm.bmj.com/content/54/24/1468.abstract AB Public health guidelines on physical activity (PA) establish national policy agendas and provide the basis for setting goals and targets. Advances in measurement and resulting new scientific findings lead to evolution of PA guidelines. PA surveillance serves to track compliance with national guidelines, usually expressed as the proportion of the population ‘meeting’ the main quantitative guidelines. The WHO recently completed a process to review and update the global PA guidelines. Changes to the guidelines, such as removal of a 10-min bout criterion, pose challenges for PA surveillance. We review the evolution of PA guidelines and associated surveillance methods and explore implications of the updated guidelines for changes in population surveillance and opportunities for technological approaches to PA to enhance surveillance.