Effect of Resistance Training Systems on Oxidative Stress in Older Women

in International Journal of Sport Nutrition and Exercise Metabolism
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The purpose of this study was to investigate the effect of two different resistance training (RT) systems on oxidative stress biomarkers in older women. Fifty-nine older women (67.9 ± 5.0 years) were randomly assigned to one of three groups. Two training groups performed an 8 week RT program either in traditional (TD, n = 20) or a pyramid (PR, n = 20) system 3 times per week, or a control group (CG, n = 19). The TD program consisted of 3 sets of 8–12 RM with constant load for the 3 sets, whereas the PR training consisted of 3 sets of 12/10/8 RM with incremental loads for each set. As compared with the CG, both TD and PR achieved upregulation of the antioxidant system as evidenced by higher (p < .05) values of total radical-trapping antioxidant parameter plasma concentration after intervention (TD= 930.4 ± 160.0 µmolTrolox, PR= 977.8 ± 145.2 µmolTrolox, CG= 794.4 ± 130.2 µmolTrolox). For the protein oxidation adducts, TD and PR presented lower (p < .05) scores compared with CG (TD= 91.2 ± 25.0 µmol/L, PR= 93.0 ± 30.3 µmol/L, CG= 111.0 ± 20.4 µmol/L). However, there were no differences (p < .05) between trained groups in the antioxidant capacity markers and in the protein oxidation adducts markers. The results suggest that 8 weeks of progressive RT promotes an improvement in markers of oxidative stress in older women independent of the load-management RT system.

Riberio is with the Center for Research in Health Sciences, University of Northern Paraná, Londrina, Brazil. Deminice, Tomeleri, Padilha, and Cyrino are with the Metabolism, Nutrition, and Exercise Laboratory, Londrina State University, Londrina, Brazil. Schoenfeld is with the Exercise Science Department, CUNY Lehman College, Bronx, NY. Venturini and Barbosa are with the Clinical Analyses Laboratory, Londrina State University, Londrina, Brazil. Sardinha is with the Exercise and Health Laboratory, CIPER, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal.

Address author correspondence to Alex S. Ribeiro at alex-silvaribeiro@hotmail.com