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THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS
Rivista di Medicina, Traumatologia e Psicologia dello Sport
Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
ORIGINAL ARTICLES EXCERCISE PHYSIOLOGY AND BIOMECHANICS
The Journal of Sports Medicine and Physical Fitness 2015 Gennaio-Febbraio;55(1-2):9-15
Effects of acute L-carnitine supplementation on nitric oxide production and oxidative stress after exhaustive exercise in young soccer players
Atalay Guzel N. 1, Erikoglu Orer G. 2, Sezen Bircan F. 3, Coskun Cevher S. 3 ✉
1 Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara, Turkey;
2 School of Physical Education and Sports, Aksaray University, Aksaray, Turkey;
3 Department of Biology, Faculty of Science, Gazi University, Ankara, Turkey
AIM: The aim of this study was to investigate the effect of acute L-carnitine supplementation at two different doses on nitric oxide (NO) production and oxidative stress after exhaustive exercise.
METHODS: The subjects were 26 healthy males aged 17-19 years. Subjects were randomly divided into two groups of 13 each and received 3 or 4 g L-carnitine via a glass of fruit juice. After 1 h, the treadmill test was started at a speed of 8 km/h, afterwards increasing the speed 1 km/h every 3 min with a 1 min rest before every speed increase until exhaustion. Venous blood samples were collected again within 5 min following the exercise test. One week later, the test was repeated on the same athletes with placebo fluids. All subjects received a placebo via a glass of fruit juice. 1 h after the same exercise protocol mentioned above was performed and blood samples were drawn immediately. These plasma samples were used for measurement of nitrate-nitrite (NOx), which are known to be the stable end products of NO, TBARs as a lipid peroxidation indicator and an antioxidant glutathione (GSH) levels.
RESULTS AND CONCLUSION: The results of this study have shown that L-carnitine applied at a 3 g dose provides strong antioxidant action by increasing the GSH and NOx level and decreasing the TBARs level.