The Effect of Acute Resistance Exercise on Serum Malondialdehyde in Resistance-Trained and Untrained Collegiate Men

• Autores: Curt B. Dixon, Robert J. Robertson, Fredric L. Goss, Jeffrey M. Timmer, Elizabeth F. Nagle
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 20, Nº. 3, 2006, págs. 693-698
• Idioma: inglés
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• Resumen

  • Dixon, C.B., R.J. Robertson, F.L. Goss, J.M. Timmer, E.F. Nagle, and R.W. Evans. The effect of acute resistance exercise on serum malondialdehyde in resistance-trained and untrained collegiate men. J. Strength Cond. Res. 20(3):693-698. 2006.-The purposes of this study were to determine whether acute resistance exercise increases serum malondialdehyde (MDA) levels postexercise, and if so, whether resistance exercise training status influences the magnitude of the exercise-induced lipid peroxidation response. Twelve recreationally resistance-trained (RT) and 12 untrained (UT) men who did not have resistance exercise experience in the past year participated in this study. All subjects completed an 8-exercise circuit resistance exercise protocol consisting of 3 sets of 10 repetitions at 10 repetitions maximum for each exercise. Blood samples were obtained pre-exercise, at 5 minutes postexercise, and at 6, 24, and 48 hours postexercise. At pre-exercise, MDA (nmol·ml?1) averaged 3.41 ± 0.25 (RT) and 3.20 ± 0.25 (UT) and did not differ (p > 0.05) either between groups or over time. Creatine kinase (IU·L?1) was significantly (p < 0.05) elevated 5 minutes postexercise (170.6 ± 25.8), 6 hours postexercise (290.3 ± 34.4), 24 hours postexercise (365.5 ± 49.9), and 48 hours postexercise (247.5 ± 38.5) as compared with pre-exercise (126.4 ± 20.2) for both groups. There was no difference (p > 0.05) in CK activity between groups. This study indicated that moderate-intensity whole-body resistance exercise had no effect on serum MDA concentration in RT and UT subjects.