This study examined the effect of sodium citrate ingestion on high-intensity cycling performance in repeated 45-s bouts. Twelve subjects (9 male and 3 female) ingested either a sodium citrate solution (0.3 g ⋅ kg−1 body mass [BM]) or a placebo 90 min prior to exercise. Postingestion blood HCO3 concentrations were significantly higher in the citrate trial (p < .01), but there was no difference in blood pH between trials. Peak power and total work significantly decreased over the five bouts (p < .05) and postexercise blood lactate concentrations significantly increased over the five bouts (p < 0.01), but there were no differences between trials. We conclude that sodium citrate ingestion (0.3 g ⋅ kg−1 BM) is not an effective ergogenic aid for high-intensity, intermittent exercise as simulated in this protocol.
K. van Someren is with the Human Performance Lab, Department of Sport, Health and Exercise Science, St. Mary’s University College, Waldegrave Road, Strawberry Hill, Twickenham, Middlesex, TW1 4SX, UK. K. Fulcher, J. McCarthy, J. Moore, and G. Horgan are with the National Sports Medicine Institute, Medical College of St. Bartholomew’s Hospital, Charterhouse Square, London, EC1M 6BQ, UK. R. Langford is with the Department of Anaesthetics, St. Bartholomew’s Hospital, West Smithfield, London, EC1M 6BQ, UK.