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# 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

1. Values are means ± SD.
2. 1)By two-way ANOVA with repeated measures analysis of variance with post hoc Tukey’s tests.
3. Differences from Untrained group, *P <0.05, **P <0.01, ***P <0.001.
4. Differences from P6, †P <0.01.
5. 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.