RT Journal Article SR Electronic T1 Physical activity in the UK: a unique crossroad? 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 912 OP 914 DO 10.1136/bjsm.2010.073726 VO 44 IS 13 A1 Weiler, Richard A1 Stamatakis, Emmanuel YR 2010 UL http://bjsm.bmj.com/content/44/13/912.abstract AB