TABLE 2.

Amino acid (l-form), protein, and carbohydrate contents of nutritional treatments consisting of carbohydrate co-ingested with whey, soy, or free leucine-enriched soy protein after a single bout of concurrent exercise in young recreationally active men¹

Nutritional treatment group
	WHEY	SOY	SOY + LEU
Amino acid content, g
Alanine	1.02	0.76	0.76
Arginine	0.62	1.34	1.34
Asparagine	2.36	2.04	2.04
Cysteine	0.56	0.22	0.22
Glutamine	3.66	3.36	3.36
Glycine	0.38	0.74	0.74
Histidine	0.44	0.46	0.46
Isoleucine	1.14	0.86	0.86
Leucine	2.58	1.44	1.44
Lysine	2.14	1.12	1.12
Methionine	0.48	0.22	0.22
Phenylalanine	0.78	0.92	0.92
Proline	1.02	0.90	0.90
Serine	0.94	0.92	0.92
Threonine	1.08	0.68	0.68
Tryptophan	0.42	0.24	0.24
Tyrosine	0.74	0.66	0.66
Valine	1.06	0.88	0.88
Added free amino acids, g
Leucine	0.00	0.00	1.142
Totals, g
Leucine	2.58	1.44	2.58
ƩNEAA	11.30	10.94	10.94
ƩEAA	10.12	6.82	7.96
ƩAA	21.42	17.76	18.90
Protein3	20.00	20.00	20.00
Carbohydrate	45.00	45.00	45.00

¹AA, amino acids; EAA, essential amino acids; NEAA, nonessential amino acids;WHEY, 45 g carbohydrate co-ingested with 20 g whey protein; SOY, 45 g carbohydrate co-ingested with 20 g soy protein; SOY + LEU, 45 g carbohydrate co-ingested with 20 g soy protein enriched with leucine to match the leucine content of WHEY.

²The added leucine in SOY + LEU was in addition to 20 g total protein.

³Total protein was calculated as nitrogen × 6.38 for whey and nitrogen × 6.25 for soy protein.