RT Journal Article SR Electronic T1 Dr. W. L. Neustatter 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 121 OP 121 DO 10.1136/bjsm.13.3.121 VO 13 IS 3 A1 H. E. Robson YR 1979 UL http://bjsm.bmj.com/content/13/3/121.abstract AB