Abstract

RIOS ENRIQUEZ, O.; GUERRA-HERNANDEZ, E.  and  FERICHE FERNANDEZ-CASTANYS, B.. Effects of the metabolic alkalosis induced by the diet in the high intensity anaerobic performance. Nutr. Hosp. [online]. 2010, vol.25, n.5, pp.768-773. ISSN 1699-5198.

Objectives: The purpose of this study is to compare the effects of two diets, one acidifier and the other alkalizer, on the sport performance in an extreme anaerobic stress test. Methods: For that purpose thirteen individuals were subjected to two such diets in a crossed test for two and a half days. Immediately after, they were tested in a maximum lactic anaerobic stress test of stable state to exhaustion on an ergo-cycle at 250W. Results: The assessment of the diets yielded a significant difference in the estimated NAE (net acid excretion) and a caloric deficit of 54% on the alkalizer diet, mainly due to a reduced ingestion of carbohydrates. The urinary pH increased by 83% for the individuals subjected to the alkalizer diet, 77% of those subjects experienced an increase in their blood lactate level during the test. The time to exhaustion while on the test improved or remained in 58% of the subjects, being the females who reacted best to the diet in 83% of the cases. Conclusions: There seems to be evidence of improvement in extreme anaerobic stress test to exhaustion from 60s to 2 mins of duration after consuming a diet with alkalizer potential.

Keywords : NAE (net acid excretion); PRAL (Potential Renal Acid Load); Metabolic alkalosis; Dietetic modification; Stress test; Lactic anaerobic exercise.

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