RT Journal Article SR Electronic T1 Sodium ingestion and hyponatraemia: sports drinks do not prevent a fall in serum sodium concentration during exercise 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 372 OP 372 DO 10.1136/bjsm.2005.022400 VO 40 IS 4 A1 J Dugas YR 2006 UL http://bjsm.bmj.com/content/40/4/372.1.abstract AB