Sodium citrate ingestion increases glycolytic activity but does not enhance 2000 m rowing performance
Abstract
Sodium citrate-induced alkalosis is an ergogenic strategy that has been proven to enhance physical performance in high-intensity exercises by increasing muscle buffer capacity and reducing the influence of H+ on energy production and contractile processes. The objective of the present study was to evaluate whether acute sodium citrate ingestion may contribute to rowing performance in a 2000-m race simulation. Six well-trained competitive rowers took part in the study, but five of them have completed the whole experimental protocol. They were assessed twice for performance and lactate 2.5 h after the ingestion of a 750-mL natural mango juice containing sodium citrate (0.5 g·kg-1) or no substance added (placebo). The two experiments occurred 7-15 days apart. The study was conducted in a double-blind, placebo-controlled, cross-over fashion. Performance was assessed in a rower ergometer and blood lactate was determined in both conditions at rest and after exercise. Heart-rate and oxygen consumption were monitored throughout the tests. Data were analyzed using the Wilcoxon's signed rank test. Sodium citrate yielded a significantly higher lactate response to exercise than placebo (p < 0.05), but no significant differences were found between treatments for performance, heart-rate and oxygen consumption. In conclusion, sodium citrate promoted a favorable metabolic environment for exercise performance but did not exert any influence on simulated rowing performance.
Keywords
References
Artioli, G.G., Gualano, B., Coelho, D.F., Benatti, F.B., Gailey, A.W., Lancha, A.H. Does sodium-bicarbonate ingestion improve simulated judo performance? Int J Sport Nutr Exerc Metab. 2007; 17(2):206-17. https://doi.org/10.1123/ijsnem.17.2.206
Ball, D., Maughan, R.J. The effect of sodium citrate ingestion on the metabolic response to intense exercise following diet manipulation in man. Exp Physiol. 1997; 82(6):1041-56. https://doi.org/10.1113/expphysiol.1997.sp004079
Berger, N.J., Mcnaughton, L.R., Keatley, S., Wilkerson, D.P., Jones, A.M. Sodium bicarbonate ingestion alters the slow but not the fast phase of VO2 kinetics. Med Sci Sports Exerc. 2006; 38(11):1909-17. https://doi.org/10.1249/01.mss.0000233791.85916.33
Bishop, D., Edge, J., Davis, C., Goodman, C. Induced metabolic alkalosis affects muscle metabolism and repeated-sprint ability. Med Sci Sports Exerc. 2004; 36(5):807-13. https://doi.org/10.1249/01.MSS.0000126392.20025.17
Bouissou, P., Defer, G., Guezennec, C.Y., Estrade, P.Y., Serrurier, B. Metabolic and blood catecholamine responses to exercise during alkalosis. Med Sci Sports Exerc. 1988; 20(3):228-32. https://doi.org/10.1249/00005768-198806000-00003
Bracken, R.M., Linnane, D.M., Brooks, S. Alkalosis and the plasma catecholamine response to high-intensity exercise in man. Med Sci Sports Exerc. 2005; 37(2):227-33. https://doi.org/10.1249/01.MSS.0000152704.34531.B6
Cox, G., Jenkins, D.G. The physiological and ventilatory responses to repeated 60 s sprints following sodium citrate ingestion. J Sports Sci. 1994; 12(5):469-75. https://doi.org/10.1080/02640419408732197
De Campos Mello, F., De Moraes Bertuzzi, R.C., Grangeiro, P.M., Franchini, E. Energy systems contributions in 2,000 m race simulation: a comparison among rowing ergometers and water. Eur J Appl Physiol. 2009; 107(5):615-9. https://doi.org/10.1007/s00421-009-1172-9
Hagerman, F.C., Connors, M.C., Gault, J.A., Hagerman, G.R., Polinski, W.J. Energy expenditure during simulated rowing. J Appl Physiol. 1978; 45(1):87-93.
Hagerman, F.C. Physiology of Competitive Rowing. In: Jr WE Garret and DT Kirkendall (Eds.). Exercise and Sport Science. Philadelphia: Lippincott Williams & Wilkins; 2000.
Horswill, C.A. Effects of bicarbonate, citrate, and phosphate loading on performance. Int J Sport Nutr. 1995; 5 Suppl: S111-9. https://doi.org/10.1123/ijsn.5.s1.s111
Kozak-Collins, K., Burke, E.R., Schoene, R.B. Sodium bicarbonate ingestion does not improve performance in women cyclists. Med Sci Sports Exerc. 1994; 26(12):1510-5. https://doi.org/10.1249/00005768-199412000-00015
Mcnaughton, L., Cedaro, R. Sodium citrate ingestion and its effects on maximal anaerobic exercise of different durations. Eur J Appl Physiol Occup Physiol. 1992; 64(1):36-41. https://doi.org/10.1007/BF00376437
Mcnaughton, L.R., Siegler, J., Midgley, A. Ergogenic effects of sodium bicarbonate. Curr Sports Med Rep. 2008; 7(4):230-6. https://doi.org/10.1249/JSR.0b013e31817ef530
Mcnaughton, L.R. Sodium bicarbonate ingestion and its effects on anaerobic exercise of various durations. J Sports Sci. 1992; 10(5):425-35. https://doi.org/10.1080/02640419208729941
Mcnaughton, L.R. Sodium citrate and anaerobic performance: implications of dosage. Eur J Appl Physiol Occup Physiol. 1990; 61(5-6):392-7. https://doi.org/10.1007/BF00236058
Mickelson, T.C., Hagerman, F.C. Anaerobic threshold measurements of elite oarsmen. Med Sci Sports Exerc. 1982; 14(6):440-4. https://doi.org/10.1249/00005768-198206000-00006
Potteiger, J.A., Nickel, G.L., Webster, M.J., Haub, M.D., Palmer, R.J. Sodium citrate ingestion enhances 30 km cycling performance. Int J Sports Med. 1996; 17(1):7-11. https://doi.org/10.1055/s-2007-972800
Pripstein, L.P., Rhodes, E.C., Mckenzie, D.C., Coutts, K.D. Aerobic and anaerobic energy during a 2-km race simulation in female rowers. Eur J Appl Physiol Occup Physiol. 1999; 79(6):491-4. https://doi.org/10.1007/s004210050542
Raymer, G.H., Marsh, G.D., Kowalchuk, J.M., Thompson, R.T. Metabolic effects of induced alkalosis during progressive forearm exercise to fatigue. J Appl Physiol. 2004; 96(6):2050-6. https://doi.org/10.1152/japplphysiol.01261.2003
Requena, B., Zabala, M., Padial, P., Feriche, B. Sodium bicarbonate and sodium citrate: ergogenic aids? J Strength Cond Res. 2005; 19(1):213-24. https://doi.org/10.1519/00124278-200502000-00036
Russell, A.P., Le Rossignol, P.F., Sparrow, W.A. Prediction of elite schoolboy 2000m rowing ergometer performance from metabolic, anthropometric and strength variables. J Sports Sci. 1998; 16(8):749-54. https://doi.org/10.1080/026404198366380
Siegler, J.C., Hirscher, K. Sodium bicarbonate ingestion and boxing performance. J Strength Cond Res. 2010; 24(1):103-8. https://doi.org/10.1519/JSC.0b013e3181a392b2
Stephens, T.J., Mckenna, M.J., Canny, B.J., Snow, R.J., Mcconell, G.K. Effect of sodium bicarbonate on muscle metabolism during intense endurance cycling. Med Sci Sports Exerc. 2002; 34(4):614-21.
DOI: https://doi.org/10.4100/jhse.2010.53.11