RT Journal Article SR Electronic T1 Dr. F. H. LEE 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 38 OP 38 DO 10.1136/bjsm.15.1.38 VO 15 IS 1 A1 H. E. Robson YR 1981 UL http://bjsm.bmj.com/content/15/1/38.abstract AB