2008). The purpose of this study was to selleck inhibitor replace a portion of a high-molecular check details weight carbohydrate with whey protein to determine if it could enhance muscle glycogen re-synthesis following a heavy resistance training bout and/or enhance a subsequent bout of exercise (15 min cycle ergometer time trial) 2 hours later. Methods 10 recreationally active, fasted males (21.5 years; 178.1 cm; 79.5 kg) performed 5 sets of hack squats, 5 sets of
leg press, and 5 sets of leg extension at 80% of 1 RM to failure (in attempt to reduce muscle glycogen content). Rest periods between sets and exercises were 150 seconds. Immediately following the RT bout, participants were block-randomized Selleck GANT61 to consume a 1 liter solution containing either 1.0 g/kg of carbohydrate from Vitargo® S2 or 0.75 g/kg of carbohydrate from Vitargo® S2 + 0.25 g/kg of a commercially available whey protein product (whey protein isolate, whey protein concentrate, and
whey protein hydrolysates). Both supplements were ~ isocaloric. Exactly one week later, the participants performed the same resistance training (RT) protocol, but consumed the second solution. After consuming the supplement, the subjects rested in a semi-supine position for 2 hours. Following the rest period, the participants performed a 15 minute time trial on a cycle ergometer. The time-trial was programmed in a pedaling dependent mode, in which an P-type ATPase increase in pedaling rate increased the work rate. Total work (kJ) was recorded at 5, 10, and 15 minutes. A two-way (2 × 3 – supplement × time) ANOVA with repeated measures was utilized to analyze the data using SPSS 16.0. Results Data are reported as means ± SD at
5, 10, and 15 minutes during the time-trial. Total work was 53.4 ± 13.7, 102.7 ± 27.4, 150.8 ± 41.2 and 52.1 ± 13.6, 100.8 ± 28.1, 149.7 ± 42.5 for the Vitargo® S2 and Vitargo® S2 + whey protein groups, respectively. A significant main effect for time was observed (p < 0.001), but no significant main effect for treatment (p = .550) or significant treatment*time interaction (p = 0.798) was observed for total work (kJ). Conclusion Consuming 0.75 g/kg of carbohydrate from Vitargo® S2 + 0.25 g/kg of whey protein does not enhance a subsequent bout of exercise performance above that observed when 1 g/kg of carbohydrate from Vitargo® S2 alone was consumed. Acknowledgements This study was supported by funds from the Baylor University Research Committee and the Vice Provost for Research."
“Background The purpose of this study was to compare the ability of two types of bottled water to rehydrate cyclists following a dehydrating bout of cycling exercise.