Table 3.

Intracellular leucine and phenylalanine concentrations in response to ingesting 20 or 40 g of whey protein in low (LLBM) and high (HLBM) lean body mass groups

	Leucine				Phenylalanine
	0	180	300	AUC	0	180	300	AUC
LLBM 20 g	128 ± 24	148 ± 42	149 ± 34	4380 ± 7555#	57 ± 11	49 ± 14	52 ± 13	−1478 ± 2572
LLBM 40 g	132 ± 26	176 ± 42*	159 ± 39*	8436 ± 7701*, #	56 ± 12	48 ± 13	50 ± 11	−1538 ± 2779
HLBM 20 g	145 ± 47	136 ± 44	124 ± 31	−1934 ± 6039	54 ± 10	46 ± 13	48 ± 14	−2194 ± 1608
HLBM 40 g	135 ± 28	159 ± 48*	160 ± 35*	5027 ± 6109*	58 ± 11	45 ± 15	50 ± 11	−2670 ± 1785

LLBM, low lean body mass group; HLBM, high lean body mass group, 20 g, twenty grams of ingested whey protein; 40 g, forty grams of ingested whey protein; 0, time of whey protein ingestion; 180, 180 min after whey protein ingestion, 300, 300 min after whey protein ingestion; AUC, area under the curve with baseline set as the concentration at the 0 min time point. Data expressed as nmol·mL⁻¹ intracellular water (concentration) and nmol·mL⁻¹ × 300 min (AUC) and values presented are means ± SD.

*Significant difference compared with 20 g dose; ^#significant difference between groups at corresponding protein dose.