FIGURE 5.

Whole-body phenylalanine kinetics. Exogenous R_a (A), endogenous R_a (B), total R_a (C), and total R_d (D) (μmol phenylalanine · kg⁻¹ · min⁻¹) during postabsorptive conditions (t = 0 min) and during postprandial conditions (t = 20–360 min) after beverage intake during recovery from a single bout of endurance exercise in young men. Values represent means ± SEMs, n = 12 per group. Data for exogenous R_a, endogenous R_a, total R_a, and total R_d were analyzed by a 2-factor repeated-measures ANOVA. Tukey post hoc testing was used to detect differences between groups. Labeled means within a time without a common letter differ, P < 0.05. R_a, rate of appearance; R_d, rate of disappearance; 0 g PRO, 45 g carbohydrate co-ingested with 0 g protein; 15 g PRO, 45 g carbohydrate co-ingested with 15 g protein; 30 g PRO, 45 g carbohydrate co-ingested with 30 g protein; 45 g PRO, 45 g carbohydrate co-ingested with 45 g protein.