The effects of an oral electrolyte solution on serum electrolytes following a submaximum exercise stress

The purpose of this study was to investigate the possible effects of ingestion of an oral electrolyte solution containing sodium, potassium, chloride, and phosphate on cardiovascular, pulmonary, and metabolic efficiency of adult male subjects in the performance of a submaximum work capacity 170 test on a bicycle ergometer. Twenty-six male students randomly selected from general activity classes at California State University, Northridge, served as subjects for this study. The experimental group was allowed the ingestion of a commercial electrolyte solution. Control group subjects were given a placebo solution containing only a flavoring agent and water with no electrolytes. The investigation utilized a double blind design. Neither subjects nor investigator knew if the solution the subjects were drinking contained the electrolytes or a placebo. A submaximum work performance followed on a bicycle ergometer. Upon completion of the work bout a blood sample was taken for analysis of serum sodium, potassium, magnesium and chloride. The data were statistically analyzed using independent group t-test of mean change, standard t-test for independent groups, and trend analyses. The null hypothesis stated that any changes brought about in serum sodium, potassium, magnesium, or chloride concentrations in blood plasma through ingestion of an oral electrolyte solution would have no significant effect upon cardiovascular, pulmonary, or metabolic efficiency. The null hypothesis was supported by the findings of this study. The following general conclusion appears justified. “The ingestion of an oral electrolyte solution prior to and after specific warm-up does not significantly alter serum sodium, potassium, magnesium, or chloride levels or caused a significant change in cardiovascular, pulmonary, or metabolic efficiency following a submaximum work capacity performance on a bicycle ergometer.