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 249 OP 250 DO 10.1136/bjsm.35.4.249 VO 35 IS 4 A1 J A Maclean YR 2001 UL http://bjsm.bmj.com/content/35/4/249.abstract AB