Oral vitamin C administration Decreases Training Efficiency and Muscle Mitochondrial Biogenesis in Rats | ||||
Bulletin of Egyptian Society for Physiological Sciences | ||||
Article 15, Volume 29, Issue 2, December 2009, Page 207-218 PDF (195.17 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/besps.2009.36720 | ||||
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Authors | ||||
Saad El-Sekelly* 1; Mohamed Hasan2; Ibrahem Abd Allah3 | ||||
1Biochemistry Dept. Faculty ofMedicine, Minia University | ||||
2Theoretical and Application Group sports Dept. Faculty of Sport Education, Zagazig University | ||||
3Physiology Dept. Faculty of Medicine, Minia University | ||||
Abstract | ||||
Exercise practitioners often take vitamin C supplements because intense muscular contractile activity can result in oxidative stress, as indicated by altered muscle and blood glutathione concentrations and increases in protein, DNA, and lipid peroxidation. There is, however, considerable debate regarding the beneficial health effects of vitamin C supplementation. The present study was designed to study the effect of vitamin C on training efficiency in rats. Thirty male Albino rats were exercised under protocol for 6 weeks. Ten of the rats were treated with a daily dose of 500 mg/kg body weight of vitamin C (0.24 mg/cm2 body surface area). The administration of vitamin C hampered endurance capacity. The adverse effects of vitamin C may result from its capacity toreduce the exercise-induced expression of key transcription factors involved in mitochondrial biogenesis. These factors are nuclear respiratory factor 1and mitochondrial transcription factor A. Vitamin C also prevented the exercise-induced expression ofthe antioxidant enzymes superoxide dismutase and glutathione peroxidase. The study showed that Vitamin C supplementation decreases training efficiency because it prevents some cellular adaptations to exercise. | ||||
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