Physical performance and antioxidant effects in triathletes

M. Dékány, V. Nemeskéri, I. Györe, E. Ékes, Á Gógl, G. Szots, M. Petrekanits, A. Taylor, I. Berkes, József Pucsok

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Exercise results in an increased production of reactive oxygen species. Two major classes of endogenous protective mechanisms work together to ameliorate the harmful effects of oxidants in the cell: (1) components of the enzymatic scavenging system such as superoxide dismutase, glutathione-peroxidase and catalase and (2) nonenzymatic antioxidants. The purpose of this study was to identify any relationship between duration and intensity of prolonged physical exercise and markers of oxidative stress with the primary antioxidant system. Eleven triathletes performed a field test, which consisted of 1.9 km swimming, 60 km cycling and 21 km running. Venous and arterialized blood enzymatic activities of SOD, CAT, GPX, and creatine kinase and concentrations of glucose, lactate, malondialdehyde and bilirubin were determined. Athletes were divided into two groups: the more efficient group (A), and the less efficient group (B), according to their duration of the field test. The activity of GPX was significantly higher in Group A than Group B, irrespective of the duration of the exercise, but bilirubin concentration was lower. For Group B, SOD activity increased during running while CAT activity decreased after cycling and after running. Upon completion of the test, CK activity was elevated in both groups. The free radical scavenging system appears to be directly related to individiual physiological efficiency with prolonged submaximal physical exercise. According to our estimation of the individual training status and the adequate adaptation level, it is important to take into consideration the markers of free radical production and the activities of the scavenging compounds. Abbreviations: SOD - Superoxide dismutase, GPX - glutathione peroxidase, CAT - catalase, MDA - malondialdehyde, CK - creatine kinase.

Original languageEnglish
Pages (from-to)101-114
Number of pages14
JournalBiology of Sport
Volume25
Issue number2
Publication statusPublished - 2008

Fingerprint

Antioxidants
Running
Exercise
Creatine Kinase
Glutathione Peroxidase
Malondialdehyde
Bilirubin
Catalase
Superoxide Dismutase
Free Radicals
Cellular Structures
Oxidants
Athletes
Lactic Acid
Reactive Oxygen Species
Oxidative Stress
Glucose

Keywords

  • Antioxidant system
  • Free radicals
  • Oxidative stress
  • Scavenging system
  • Triathletes

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Physiology
  • Orthopedics and Sports Medicine

Cite this

Dékány, M., Nemeskéri, V., Györe, I., Ékes, E., Gógl, Á., Szots, G., ... Pucsok, J. (2008). Physical performance and antioxidant effects in triathletes. Biology of Sport, 25(2), 101-114.

Physical performance and antioxidant effects in triathletes. / Dékány, M.; Nemeskéri, V.; Györe, I.; Ékes, E.; Gógl, Á; Szots, G.; Petrekanits, M.; Taylor, A.; Berkes, I.; Pucsok, József.

In: Biology of Sport, Vol. 25, No. 2, 2008, p. 101-114.

Research output: Contribution to journalArticle

Dékány, M, Nemeskéri, V, Györe, I, Ékes, E, Gógl, Á, Szots, G, Petrekanits, M, Taylor, A, Berkes, I & Pucsok, J 2008, 'Physical performance and antioxidant effects in triathletes', Biology of Sport, vol. 25, no. 2, pp. 101-114.
Dékány M, Nemeskéri V, Györe I, Ékes E, Gógl Á, Szots G et al. Physical performance and antioxidant effects in triathletes. Biology of Sport. 2008;25(2):101-114.
Dékány, M. ; Nemeskéri, V. ; Györe, I. ; Ékes, E. ; Gógl, Á ; Szots, G. ; Petrekanits, M. ; Taylor, A. ; Berkes, I. ; Pucsok, József. / Physical performance and antioxidant effects in triathletes. In: Biology of Sport. 2008 ; Vol. 25, No. 2. pp. 101-114.
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