RT Journal Article SR Electronic T1 Dr. A. C. Nicol 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 197 OP 197 DO 10.1136/bjsm.5.4.197-a VO 5 IS 4 YR 1971 UL http://bjsm.bmj.com/content/5/4/197.2.abstract AB