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Table 2 Body weight, body weight gain, food intake, energy intake, and food efficiency

From: Hydrolyzed collagen intake increases bone mass of growing rats trained with running exercise

 

20% protein

Two-way ANOVA (p value)

40% protein

Two-way ANOVA (p value)

   

Exercise

Collagen

Interaction

 

Exercise

Collagen

Interaction

Initial body weight (g)

         

Collagen(-)

EX(-)

115.3 ± 0.9

0.739

0.665

0.787

113.7 ± 2.1

0.759

0.218

0.240

EX(+)

116.1 ± 1.5

115.5 ± 0.7

Collagen(+)

EX(-)

116.3 ± 1.6

116.6 ± 1.2

EX(+)

116.4 ± 1.8

115.6 ± 0.6

Final body weight (g)

         

Collagen(-)

EX(-)

405.3 ± 5.5

<0.001

0.250

0.350

411.7 ± 8.8

<0.001

0.014

0.903

EX(+)

342.0 ± 7.2

354.1 ± 8.5

Collagen(+)

EX(-)

391.0 ± 8.5

391.5 ± 5.4

EX(+)

340.5 ± 7.3

335.7 ± 8.7

Body weight gain (g/d)

         

Collagen(-)

EX(-)

4.0 ± 0.1

<0.001

0.189

0.259

4.1 ± 0.1

<0.001

0.006

0.758

EX(+)

3.1 ± 0.1

3.2 ± 0.1

Collagen(+)

EX(-)

3.7 ± 0.1

3.7 ± 0.1

EX(+)

3.0 ± 0.1

3.0 ± 0.1

Food intake (g/d)

         

Collagen(-)

EX(-)

20.9 ± 0.2

<0.001

0.215

0.147

19.9 ± 0.2**

<0.001

0.019

0.712

EX(+)

18.2 ± 0.4

17.9 ± 0.3

Collagen(+)

EX(-)

20.2 ± 0.2

19.3 ± 0.2**

EX(+)

18.3 ± 0.3

17.5 ± 0.12*

Food efficiency1

         

Collagen(-)

EX(-)

0.19 ± 0.00

<0.001

0.224

0.784

0.20 ± 0.00**

<0.001

0.028

0.926

EX(+)

0.17 ± 0.00

0.18 ± 0.00*

Collagen(+)

EX(-)

0.18 ± 0.01

0.19 ± 0.00

 

EX(+)

0.16 ± 0.00

   

0.17 ± 0.01

   
  1. 1Food efficiency was calculated by Body weight gain (g/d)/Food intake (g/d). EX(−): sedentary group, EX(+): exercise group.
  2. Values are expressed as means ± SE. Data were analyzed by two-way ANOVA at the 5% level of significance. Interaction means Exercise-Collagen interaction. *p < 0.05 and *p < 0.01 vs. respective 20% protein group.