Correspondence to Dr Kirsten Corder, MRC Epidemiology Unit University of Cambridge School of Clinical Medicine Box 285, Institute of Metabolic Science Cambridge Biomedical Campus Cambridge CB2 0QQ UK; ...

Cambridge CB2 0QQ, UK; ulf.ekelund{at}mrc-epid.cam.ac.uk Aim The aim of this review is to summarise issues surrounding the measurement of physical activity (PA) by self-report and accelerometry in ...