Effect of timing of protein and carbohydrate intake after resistance exercise on nitrogen balance in trained and untrained young men

Table 3 Nitrogen balance and nutrient intake in the young men immediately and 6 h after exercise

	Trained group (n = 10)		Untrained group (n = 10)		P value¹⁾
	P0	P6	P0	P6	Group experiment (Trained group *vs.(P0 vs.* P6) Untrained group)		Group *vs.* experiment
Urinary volume (mL/24 h)	1,617 ± 130	1,618 ± 97	1,501 ± 138	1,536 ± 125	0.060	0.459	0.494
Urinary urea nitrogen (g/24 h)	10.4 ± 0.8** †	10.9 ± 0.7***	9.0 ± 0.8	9.1 ± 0.9	0.001	0.001	0.005
Nitrogen excretion (g/24 h)	16.0 ± 1.0** †	16.6 ± 0.8***	14.2 ± 1.1	14.3 ± 1.1	0.001	0.001	0.005
Nitrogen intake (g/24 h)	17.1 ± 1.1**	17.1 ± 1.1**	15.5 ± 1.1	15.5 ± 1.1	0.002	0.624	0.961
Nitrogen balance (g/24 h)	1.1 ± 0.3* †	0.5 ± 0.4**	1.3 ± 0.1	1.2 ± 0.2	0.001	0.001	0.014
Nitrogen balance/body weight (mg/24 h)	15.3 ± 4.0** †	7.4 ± 5.5***	20.4 ± 2.3	19.0 ± 3.1	0.001	0.001	0.009
Nitrogen balance/LBM (mg/ 24 h)	17.4 ± 4.3** †	8.4 ± 0.2**	24.2 ± 2.8	22.5 ± 3.5	0.001	0.001	0.011
TEI (kcal)	3,187 ± 122**	3,109 ± 125**	2,734 ± 220	2,729 ± 230	0.001	0.541	0.652
Protein intake (g)	107.0 ± 7.0**	106.9 ± 6.7	96.9 ± 6.9	96.8 ± 6.8	0.012	0.621	0.412
Protein intake (g/kg body weight)	15.0 ± 0.1	15.0 ± 0.1	15.0 ± 0.1	15.0 ± 0.1	0.543	0.612	0.546

Values are means ± SD.
¹⁾By two-way ANOVA with repeated measures analysis of variance with post hoc Tukey’s tests.
Differences from Untrained group, *P <0.05, **P <0.01, ***P <0.001.
Differences from P6, †P <0.01.
LBM, lean body mass; P0, Protein and carbohydrate intake immediately after resistance exercise session; P6, Protein and carbohydrate intake 6 h after resistance exercise session; TEI, total energy intake.

ISSN: 1880-6805