It’s therefore possible that during the placebo trials participants’ experienced greater levels of muscular fatigue, as evidenced by the reduced mean power output compared to the AOX this website trials, and thus leading to a greater GH response. Further research

is needed to help determine this possibility and the potential role AOX supplementation has on GH secretion. Furthermore, as GH is an anabolic hormone its elevation during RT coupled with appropriate mechanical strain may be important for the process of muscular hypertrophy [51, 52]. This would suggest that the GH results from this study indicate they may be undesirable in regards to promoting muscular hypertrophy. It is therefore of interest for future studies to examine whether this decreased circulating GH would affect muscular hypertrophy after a prolonged period of use or whether it acutely affects IGF-1 levels. Moreover, recent

research suggests excessive AOX supplementation may hinder important physiological training adaptations [3, 53]. This has prompted the suggestion that optimal oxidant content for maximal force production exists within the muscle [53]. These recent findings and the GH results in this study, highlight the need to further our understanding of the effect of AOX supplementation on training adaptations. Conclusions In conclusion, an acute dose of a PYC based AOX supplement enhanced lower body RT performance in trained males by improving mean concentric power, velocity and total Vactosertib molecular weight work output. The mechanisms involved are still unclear considering oxidative stress response (measured as plasma XO) was not significantly reduced in the AOX treatment, as hypothesised. Future studies should incorporate further measures of oxidative stress, particularly GSH, and muscle of blood flow which may help determine the biochemical and physiological mechanisms that led to the results in this study. Furthermore, GH secretion was significantly attenuated in the AOX trial compared

to the placebo. The mechanisms that led to these results are not fully understood, but further research is required as GH secretion is involved in MH and strength development and its attenuation may negatively impact training adaptations. References 1. Ferreira LF, Reid MB: Muscle-derived ROS and thiol regulation in muscle fatigue. J Appl Phys 2008, 104:853–860. 2. Finaud J, Lac G, Filaire E: Oxidative stress relationship with exercise and training. Sports Med 2006, 36:327–358.PubMedCrossRef 3. Peternelj TT, Coombes JS: Antioxidant supplementation during exercise training beneficial or detrimental? Sports Med 2011, 41:1043–1069.PubMedCrossRef 4. Bloomer RJ, Goldfarb AH, Wideman L, McKenzie MJ, Consitt LA: Effects of acute aerobic and anaerobic exercise on blood markers of oxidative stress. J Strength Con Res 2005, 19:276–285. 5.