Document Type : Research Paper I Open Access I Released under CC BY-NC 4.0 license


1 MSc of Exercise Physiology, Department of Exercise Physiology and Biomechanics, Faculty of Sports Sciences, University of Mazandaran

2 Associate Professor of Exercise Physiology, Department of Exercise Physiology and Biomechanics, Faculty of Sports Sciences, University of Mazandaran

3 Assistant Professor of Statistics, Department of Statistics, Faculty of Mathematics, University of Mazandaran

4 PhD Student of Exercise Physiology, Department of Exercise Physiology and Biomechanics, Faculty of Sports Sciences, University of Mazandaran


The aim of this study was to investigate the effect of magnesium sulfate supplementation on fatigue threshold electromyography (EMGFT), lactate and time to exhaustion (TTE) following a session of aerobic exercise (exhaustive treadmill running) in sedentary collegiate men. For this purpose, 16 sedentary male students (mean age: 25.25 ± 1.18 years, height: 176.18 ± 4.75 cm, weight: 79.51 ± 25.65 kg) were randomly divided into supplementary (n=8) and placebo (n=8) groups. Blood samples were collected in four phases: before and immediately after Bruce test in pretest and posttest. Data were analyzed by repeated measures test, covariance analysis and independent and dependent t tests at P=0.05. The results showed that TTE increased (5.44%) in magnesium sulfate group after the supplementation (P<0.05). Also, magnesium sulfate supplementation increased the occurrence of EMGFT (140%) (P<0.05). But the lactate changes were not significant in both groups (P>0.05). The results of this study indicated that the supplementation of magnesium sulfate lowered the slope of muscle EMGFT activity following a session of exhaustive treadmill running.


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