RT Journal Article SR Electronic T1 David Patrick Chapman MCSP, SRP 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 6 OP 6 DO 10.1136/bjsm.27.1.6 VO 27 IS 1 YR 1993 UL http://bjsm.bmj.com/content/27/1/6.abstract AB