Effects of endurance training on skeletal muscle oxidative capacities with and without selenium supplementation

Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS)
I MargaritisJ F Marini

Abstract

The purpose of this study was to examine the changes induced by endurance training, with or without selenium (Se) supplementation on: 1) mitochondrial activity of succinate dehydrogenase (SDH) and cytochrome c oxidase (Cyt Ox),2) the myosin heavy chain (MHC) expression in muscle fibers and 3) their association with aerobic performance. Twenty-four male students volunteered to participate in this double blind study: selenium (Sel, N = 12) vs placebo (Pla, N = 12). During a 10-wk endurance training program, the Sel group received a daily Se supplementation containing 180 micrograms of organic selenium (selenomethionine), while the Pla group received a placebo. Before (Pre) and after (Post) the program (3 sessions wk-1) an endurance exercise (Capmax) was performed in order to determine the aerobic endurance capacity assessed by the total oxygen uptake during the running test (VO2tot). All parameters of aerobic performance were increased in both groups, concomitantly to a rise in mitochondrial Cyt Ox activity. Two positive relationships were found: 1) between type I MHC and VO2tot increments (r = 0.65, P < 0.05), 2) between training volumes and VO2tot increments (r = 0.53, P < 0.05; N = 23). The training program produced an 8.2% si...Continue Reading

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Citations

Oct 3, 2001·Clinica Chimica Acta; International Journal of Clinical Chemistry·M SpeichF Ballereau
Apr 3, 2001·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·S E TerblancheG A Brooks
Feb 20, 2004·Journal of Sports Sciences·Scott K PowersKaryn L Hamilton
Apr 4, 2003·Journal of the American College of Nutrition·Irène MargaritisAlain Favier
Jul 27, 2010·PM & R : the Journal of Injury, Function, and Rehabilitation·Randall E Keyser
Jan 15, 2008·Free Radical Biology & Medicine·Marina Bar-ShaiAbraham Z Reznick
Jul 9, 2008·Current Sports Medicine Reports·Stella Lucia Volpe
Aug 3, 2018·Journal of the International Society of Sports Nutrition·Chad M KerksickRichard B Kreider
Jul 3, 2021·International Journal of Molecular Sciences·Viktor Bielik, Martin Kolisek

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