No significant differences were found for total energy (366 ± 226 kcals) and % kcals CHO (57.9 ± 21.2%), % kcals fat (27.1 ± 16.0%), and % kcals PRO (15.0 ± 8.5%) in the meal consumed in the 24 hours prior to each supplement session. A significant main effect buy A-1331852 of supplement was found for % kcals PRO (F(3,24) = 4.08, p < 0.05), such that % kcals PRO consumed before the CHO-CHO supplement was significantly greater than % kcals PRO consumed before the CHO-P supplement (19.2 ± 9.3% vs. 16.1 ± 12.5%, p = 0.042). No significant difference
was found for minutes since last meal consumed prior to each supplemental session (133.8 ± 133.4 minutes). No significant differences
were found for amount of aerobic exercise occurring in the 24 hours prior to each supplemental Selleckchem Lorlatinib session (53.3 ± 67.9 min). Environmental factors (Selleck Vismodegib temperature [11.9 ± 7.2 °C]; percent relative humidity [57.8 ± 12.5%]; and wind speed [0.6 ± 0.5 mph]) were not significantly different between supplemental sessions. A main effect of time was found for RPE and HR (p < 0.001). RPE and HR increased at all points measured (4.7 ± 0.7; 9.7 ± 0.9, F(1,24) = 395.49; 84.4 ± 14.5 bpm, 166.0 ± 8.3 bpm, 178.8 ± 7.4 bpm, F(2,48) = 581.08). No significant differences in time to complete the run (PLA = 88.6 ± 11.6 min; CHO = 89.1 ± 11.3 min; CHO-P = 89.1 ±11.8 min; CHO-CHO = 89.6 ± 11.9 min) (Figure 1), or sprint to finish (PLA = 8.3 ± 1.2 min; CHO = 8.2 ±1.2 min; CHO-P = 8.2 ± 1.0 min; CHO-CHO = 8.4 ± 1.5 min) (Figure 2) was found among supplemental session. The effect size between any of the supplements and PLA on endurance performance was very small (d = 0.1).
Effect size between PLA and CHO, CHO-P, and CHO-CHO supplements during the 19.2 km run, favoring PLA, was 0.06, 0.059, 0.1, respectively. In addition, for the last 1.92 km of the Oxymatrine course, the effect size between PLA and CHO and PLA and CHO-P, favoring the caloric supplements, was 0.08; effect size between PLA and CHO-CHO, favoring the PLA, was 0.07. Figure 1 Time to complete 19.2 km time trials for each supplement (M ± SD). N = 12; CHO = Carbohydrate; CHO-P = Carbohydrate-Protein; CHO-CHO = Double Carbohydrate; PLA = Placebo. Figure 2 Time to complete final 1.92 km sprint to the finish (M ± SD). N = 12; CHO = Carbohydrate; CHO-P = Carbohydrate-Protein; CHO-CHO = Double Carbohydrate; PLA = Placebo. Discussion The use of CHO-P supplementation during exercise, as opposed to CHO supplementation, is a rising trend among endurance athletes. Previous research has found mixed outcomes regarding CHO-P supplementation and endurance performance enhancement, with all investigations conducted within controlled laboratory settings [5–14].