effect of administration of some dietary supplement on their levels in plasma and urine after severe muscular exercise in athletes

ABSTRACT

Minerals are essential for a wide variety of metabolic and physiologic processes in the human body. Some of the physiologic roles of minerals important to athletes are their involvement in muscle contraction, normal heart rhythm, nerve impulse conduction, oxygen transport, oxidative phosphorylation, enzyme activation, immune functions, antioxidant activity, bone health, and acid-base balance of the blood. Magnesium, zinc, and chromium are mineral elements required in modest amounts to maintain health and optimal physiologic function. For physically active persons, adequate amounts of these micronutrients are needed in the diet to ensure the capacity for increased energy expenditure and work performance. Inadequate intakes of magnesium and zinc have been reported for participants in activities requiring restriction of body weight. The aim of this study is to examine the effect of taking the suggested selected nutritional supplements [magnesium, zinc, chromium] on their concentrations rate in blood and urine and to get the percentages averages of the selected supplements concentration after action levels in both blood and urine after the highintensity endurance exercise. It is an experimental study with prepost measurements classification as we used one experimental group and measured the physiological variables pre and post performing the exercise with and without the dietary supplement, respectively. The research sample was selected deliberately as 14 individuals of the high-technology institute in the 10[th] of Ramadan City students who practices swimming and subjected to taking the suggested supplements [Hl. Chrom Capsule 200 microgram- Vita Zinc Capsule 25 mg -Cal Mag Capsule 300 mg] 3 hours before performing the exercise on the treadmill by using Incremental Exercise Test. This study showed that there was reduction in the levels of selected minerals concentrations in the blood and increase in the levels of these minerals concentrations in the urine as a result of the highintensity endurance exercise but it is not significant reduction or significant increase. Also, there was increase in the concentrations of the selected minerals in the blood after taking the supplements as it compensates the loss which happens as result of sweat, urine, and feces. It is concluded that. The allure of supplemental magnesium, zinc, and chromium as a way to improve well-being and enhance physical performance should be viewed with caution. Experimental evidence indicates that acute physical activity increases loss of minerals but that these losses are transient. Furthermore, when dietary intake of the mineral elements is consistent with population guidelines, there is no alteration in mineral status as evidenced by plasma or serum concentrations. Evidence of beneficial effects of generalized supplementation of minerals is equivocal. Whereas some studies indicate improvement in physical performance with supplementation, the nutritional status of the participants is inadequately documented. So, it is recommended to have diets rich with the selected minerals to compensate the shortage which happens through its depletion in blood and increased secretion in urine as a result of the highintensity endurance exercise