Ergogenic effects of quercetin supplementation in trained rats Casuso, Rafael A. Martínez-Amat, Antonio Martínez-López, Emilio José Camiletti-Moirón, Daniel Porres Foulquie, Jesús María Aranda Ramírez, Pilar Muscle mitochondrial biogenesis Endurance performance Exercise performance Oxygen uptake Hypertrophy Antagonists [Background] Quercetin is a natural polyphenolic compound currently under study for its ergogenic capacity to improve mitochondrial biogenesis. Sedentary mice have exhibited increased endurance performance, but results are contradictory in human models. [Methods] We examined the effects of six weeks of endurance training and quercetin supplementation on markers of endurance performance and training in a rodent model. Rats were randomly assigned to one of the following groups: placebo+sedentary (PS), quercetin+sedentary (QS), placebo+endurance training (PT) and quercetin+endurance training (QT). Quercetin was administered at a dose of 25 mg/kg on alternate days. During six weeks of treatment volume parameters of training were recorded, and after six weeks all groups performed a maximal graded VO2 max test and a low-intensity endurance run-to-fatigue test. [Results] No effects were found in VO2 peak (p>0.999), nor in distance run during low-intensity test, although it was 14% greater in QT when compared with PT (P = 0.097). Post-exercise blood lactate was increased in QT when compared with PT (p=0.023) and also in QS compared with PS (p=0.024). [Conclusions] This study showed no effects in VO2 peak, speed at VO2 peak or endurance time to exhaustion after six weeks of quercetin supplementation compared with placebo in trained rats. Quercetin was show to increase blood lactate production after high-intensity exercise. 2014-06-27T12:45:12Z 2014-06-27T12:45:12Z 2013 info:eu-repo/semantics/article Casuso, R.A.; et al. Ergogenic effects of quercetin supplementation in trained rats. Journal of the International Society of Sports Nutritions, 10: 3 (2013). [http://hdl.handle.net/10481/32396] 1550-2783 http://hdl.handle.net/10481/32396 10.1186/1550-2783-10-3 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License Biomed Central