RT Journal Article SR Electronic T1 Physical activity. A guide for community action. 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 474 OP 474 DO 10.1136/bjsm.34.6.474 VO 34 IS 6 A1 Langton, A YR 2000 UL http://bjsm.bmj.com/content/34/6/474.3.abstract AB