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 302 OP 302 DO 10.1136/bjsm.35.5.302 VO 35 IS 5 A1 P McCrory YR 2001 UL http://bjsm.bmj.com/content/35/5/302.abstract AB