RT Journal Article SR Electronic T1 Mr. W. A. C. SHILLIBEER 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 157 OP 157 DO 10.1136/bjsm.14.2-3.157 VO 14 IS 2-3 A1 D. P. Chapman YR 1980 UL http://bjsm.bmj.com/content/14/2-3/157.abstract AB