Author(s): Pooyan Sabet, Vahideh Razmi and Mahdi Soleimani Farrokh

Abstract:
This study aimed to investigate the effect of the maximum standard test on changes in selective serum electrolytes before and after a 12-week training period. This study was a quasi-experimental study in which 40 male university endurance runners of Shiraz city who had volunteered participated. Laboratory instruments and measuring instruments such as flame photometers, spectrophotometer, and atomic absorption were used to determine blood electrolytes, and statistical analysis was performed by continuous t-test. The test results showed that the concentrations of sodium, potassium, calcium, magnesium, and Chlorine in post-tests before and after the training period, compared to pre-tests before and after the training period, were at (P<0.05%) found a significant difference. The overall result of the study is that electrolyte changes depend on the duration and intensity of exercise. Excessive changes in electrolyte concentrations can impair optimal athletic performance. Endurance athletes should be advised not to skip electrolyte supplements and drink fluids.

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