Abstract

With the aim of testing the effect of sodium citrate ingestion on exhaustion time during a high intensity exercise under acute moderate altitude (H), seventeen healthy males V.O2max of 55.5±9.17) executed an effort protocol after the ingestion of a placebo (HP) or sodium citrate (HC). In addition to the test time (TP), the oxygen consumption (V.O2), ventilation (Ve), respiratory exchange ratio (RER) and heart rate (FC) where recorded during the exercise. At the conclusion of the exercise the maximum concentration of blood lactate was also determined (Lac). The effect of the citrate ingestion on the registered parameters was analyzed by an ANOVA test for paired data. Sodium citrate intake did not significantly affect the exhaustion effort time nor the maximum concentration of blood lactate (169.94±33.58 vs 161.82±33.96 sg and 15.3±2,1 vs 15.5±2.8 mMol/l for HP and HC respectively). The other analyzed parameters were not affected by the citrate administration with the to exception of Ve, which showed a significant reduction in its value (p<0.05) with sodium citrate (185.71±22.98 vs 179.06±22.91 l/min for HP and HC respectively). Therefore, in suddent altitude, the result found do not show changes in the anaerobic performance with the administration of sodium citrate. The maintenance of a similar values in the maximum blood lactate with the placebo and with sodium citrate could indicate a limitation and/or saturation of the extracellular buffer mechanisms which work on the lactate exit toward the blood. Verf.-Referat