After preparation, a lancet device was applied to the fingertip and samples were collected in capillary tubes. All lactate samples were immediately analyzed in duplicate using an Accutrend Lactate Analyzer (F. Hoffman-La Roche Ltd, Basel, Switzerland). After

compiling the data, the stage that elicited 4.0 mmol/L blood lactate which has been previously identified as the OBLA [22] was used to determine lactate threshold. OBLA, VO2max@OBLA and HR@OBLA were all calculated using linear interpolation between relevant data points as has been previously explained by Neville et al. [23]. The treadmill protocol continued until volitional exhaustion was attained and the highest heart rate experienced during the test was recorded as Max Heart Rate (MHR). Natural Product Library OBLA was then also identified by the percentage Veliparib cell line of maximum

heart rate (%MaxHR@OBLA) at which it occurred. Supplementation During the study, subjects were asked to refrain from taking any other dietary supplements or making changes to their regular dietary and exercise patterns. The participants were randomly assigned in a double-blind manner to receive either β-Alanine or Placebo. The supplements were provided to the participants in identical, unmarked, sealed containers, supplied by Athletic Edge Nutrition, Miami, Florida. Subjects received βA supplement (6.0 g·d-1 βA, 600 mg N-Acetylcysteine, 2.7 mg alpha-lipoic acid, 45 IU Vitamin E) or a PL (6.0 g·d-1 Rice Flour buy FRAX597 Maltodextrin). Both groups followed the same supplementation protocol of 3 capsules 3 times daily with meals. Supplementing with 6.4 g·d-1 of βA for 28 days has been shown to increase carnosine levels by 60% [4, 12] so it can be assumed that supplemented subjects in this study experienced a significant increase in intramuscular carnosine concentration. Three of the eight subjects in the βA supplemented group reported tingling in their fingers and hands. No other side effects were reported by those individuals Tyrosine-protein kinase BLK supplemented with βA and subjects in the PL group reported no side effects. Statistical Analysis Because of the degree of non-normality

in the distributions, data transformation could not be done to obtain statistical normality. For this reason, nonparametric statistical methods were used to analyze the data. The Friedman test was used to determine within group differences; and the Mann-Whitney test was used to determine between group differences. Data were analyzed using SPSS for Windows (Version 16.0, 2007 Chicago, IL) Prior to initiation of the study the alpha level was set at p < 0.05 to determine statistical significance. Data are presented as means ± standard error (SE). Results Participant Characteristics At baseline there were no differences in age, height, body mass, BMI, absolute VO2max L.min-1 (4.57 ± 0.8 βA vs. 4.04 ± 0.7 PL) relative VO2max ml.kg.