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 390 OP 390 DO 10.1136/bjsm.34.5.390 VO 34 IS 5 A1 Jaques, Rod YR 2000 UL http://bjsm.bmj.com/content/34/5/390.abstract AB