The effect of sodium citrate ingestion on training and performance for male 400 m runners : a field study
University of Wales Institute Cardiff
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Eight trained male subjects aged 20.25 (±1.67) years who competed regularly in 400 m races were studied under placebo (CaCO3) and alkalotic (H2CO3) conditions to investigate the effect of pre-exercise induced metabolic alkalosis on 400 m training and performance. Each subject completed two training sessions (2 x 4 x 200 m) and two 400 m competitive time trials. Ninety minutes prior to each test, the subjects ingested a 0.4 g. kg-1 BM dose of either the placebo or experimental solution. The solutions were taken in a random manner and the experiment was conducted in a double blind fashion. Measures of time, VCO2 and RPE were taken during each test. Performance was significantly improved in both the 400 m time trial (p=0.01) and the training session (p<0.01). Post exercise VCO2 values were significantly higher (p<0.05) in both performance conditions following citrate ingestion. RPE was significantly (p<0.05) reduced in both citrate trials. These data are consistent with enhanced clearance of H+ ions from the active muscle cell due to citrate ingestion. The results of this study indicate that lactic acid accumulation limits performance in both single exercise bouts and repeated sprints, thus the administration of sodium citrate is appropriate. The affect of citrate was slightly greater in the training condition. This was attributed to the fact that a more severe acidic environment was induced. It was concluded that sodium citrate could be successfully administered as an ergogenic aid prior to both to competition and training for the 400 m athlete. There were no reports of gastro-intestinal discomfort with the dose of citrate administered.
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