ANTIOXIDANTS AND EXERCISE - 08/09/11
Résumé |
Although regular muscular exercise is known to have many beneficial effects, exercise results in an increased production of radicals and other forms of reactive oxygen species (ROS).4, 8, 11, 29, 36 In fact, evidence exists to implicate ROS as an underlying cause in exercise-induced disturbances in muscle homeostasis (e.g., redox status), which could result in muscle fatigue or injury.16, 26, 29, 37, 41 Given the potential role of ROS in contributing to muscle fatigue or injury, it is not surprising that skeletal muscle myocytes contain defense mechanisms to reduce the risk for oxidative damage. Two major classes of endogenous protective mechanisms (i.e., enzymatic and nonenzymatic antioxidants) work as a unit to reduce the harmful effects of ROS in cells. This article provides a brief overview of cellular antioxidants and summarizes the current understanding of the effects of nutritional antioxidants on exercise performance. This article begins with a discussion of the primary units that comprise the endogenous antioxidant defense system in cells.
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| Address reprint requests to Scott K. Powers, PhD, Department of Exercise and Sport Sciences, Rm 25 FLG, University of Florida, Gainesville, FL 32611, e-mail: spowers@hhp.ufl.edu |
Vol 18 - N° 3
P. 525-536 - juillet 1999 Retour au numéro
Article précédent
- WATER AND ELECTROLYTE REQUIREMENTS FOR EXERCISE
- William A. Latzka, Scott J. Montain
- NUTRITION, EXERCISE, AND IMMUNE SYSTEM FUNCTION
- David C. Nieman
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