RT Journal Article SR Electronic T1 Factors affecting performance during an endurance relay. 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 138 OP 142 DO 10.1136/bjsm.11.3.138 VO 11 IS 3 A1 E. L. Lloyd A1 W. Henderson A1 B. Covell A1 G. R. Bryce YR 1977 UL http://bjsm.bmj.com/content/11/3/138.abstract AB A successful attempt by Edinburgh Athletic Club on the world record for the 24-hour 10-man x 1 mile relay is reported. The effects of a variety of factors on the performances of the athletes are assessed, and some physiological changes noted. In the light of these observations recommendations are made to help the planning of future record attempts.