Influence of endurance and endurance-strength training on mineral status in women with abdominal obesity: a randomized trial

Abstract

Background: Obesity and exercise are associated with disturbances of mineral metabolism, which can lead to physical inefficiency. Our study aimed to compare the influence of endurance and endurance-strength training on mineral status in women with abdominal obesity. Methods:Thirty-eight abdominally obesewomenwere randomized into groupsAandBand underwent 3months long training: group A-endurance training and groupB-endurance-strength training. Anthropometric andbody compositionmeasurementswere carried out and the Graded Exercise Test was performed. Blood, urine, and hair samples were collected for mineral content analysis. Results: Endurance training decreased serum Fe and Zn concentrations as well as hair Zn and Cu content, and increased urine Zn concentration. Endurance-strength training increased serum Mg and Cu concentrations, decreased serum Fe and Zn concentrations, decreased hair Ca andMg content, and increased urine Ca and Zn concentrations. After training, serumand urine Fe concentration was higher in group A, while urine Ca concentration was higher in group B. A number of correlations was found. Conclusions: Both endurance and endurance-strength training have a significant effect on mineral metabolism in obese women; the favorable effects of endurance-strength exercise predominate in iron, magnesium, zinc, and copper balance.