RT Journal Article SR Electronic T1 Commentary 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 208 OP 208 DO 10.1136/bjsm.30.3.208 VO 30 IS 3 A1 O M Rutherford YR 1996 UL http://bjsm.bmj.com/content/30/3/208.abstract AB