RT Journal Article SR Electronic T1 SportsMedUpdate 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 959 OP 960 DO 10.1136/bjsm.2009.067421 VO 43 IS 12 A1 Martin P Schwellnus YR 2009 UL http://bjsm.bmj.com/content/43/12/959.abstract AB