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Table 3 Body Composition and Resting Metabolic Rate (M ± SD) for Diet Phase and Post-Diet Phase

From: Flexible vs. rigid dieting in resistance-trained individuals seeking to optimize their physiques: A randomized controlled trial

 

FLEXIBLE (n=11)

RIGID (n=12)

 

Diet Phase

Pre

Mid

Post

â–²

(95% CI)

ES

Pre

Mid

Post

â–²

(95% CI)

ES

 

Body Weight (kg)

76.1 ± 8.4

74.2 ± 8.4

73.5 ± 8.8*

-2.6

(-3.6; -1.5)

0.30

74.9 ± 12.2

73.0 ± 11.5

71.9 ± 11.7*

-3.0 (-5.2; -0.8)

0.25

 

FFM (kg)

61.3 ± 11.3

61.1 ± 10.5

61.0 ± 10.4

-0.3

(-1.7; 1.0)

0.03

56.8 ± 10.7

57.1 ± 11.0

57.0 ± 10.8

+0.2

(-1.1; 1.5)

0.02

 

Fat Mass (kg)

14.8 ± 5.7

13.1 ± 5.6

12.5 ± 5*

-2.3

(-3.3; -1.2)

0.43

18.1 ± 6.2

15.9 ± 6.5

14.9 ± 6.5*

-3.2

(-4.7; -1.6)

0.50

 

Body Fat (%)

19.4 ± 8.5

17.9 ± 7.9

17.0 ± 7.1*

-2.4

(-4.1; -1.1)

0.31

24.0 ± 6.2

21.8 ± 7.3

20.7 ± 7.1*

-3.3

(-4.5; -2.0)

0.50

 

RMR (kcals/day)

1816 ± 229

1805 ± 169

1827 ± 257

+11

(-112; 134)

0.05

1576 ± 350

1631 ± 377

1649 ± 375

+73

(-83; 231)

0.2

 

Post-Diet Phase

Pre

Mid

Post

â–²

(95% CI)

ES

Pre

Mid

Post

â–²

(95% CI)

ES

p

Body Weight (kg)

73.5 ± 8.8

74.1 ± 9.7

75.2 ± 9.8*

+1.7

(0.2; 3.2)

0.18

71.9 ± 11.7

72.4 ± 10.8

72.3 ± 11.6

+0.4

(-0.9; 1.9)

0.03

0.461

FFM (kg)

61.0 ± 10.4

61.6 ± 10.8

62.7 ± 11.3*

+1.7

(0.8; 2.7)

0.16

57.0 ± 10.8

56.8 ± 10.3

56.3 ± 10.5

-0.7

(-1.6; 0.2)

0.07

0.037

Fat Mass (kg)

12.5 ± 5.0

12.5 ± 4.4

12.5 ± 4.4

0

(-1.1; 1.1)

0

14.9 ± 6.5

15.6 ± 6.4

16.0 ± 6.4*

+1.1

(0.1; 2.1)

0.17

0.562

Body Fat (%)

17.0 ± 7.1

17.2 ± 6.4

17.0 ± 6.6

0

(-1.5; 1.0)

0

20.7 ± 7.1

21.6 ± 7.2

22.1 ± 6.8*

+1.3

(0.03; 2.7)

0.19

0.338

RMR (kcals/day)

1848 ± 261

1850 ± 279

1983 ± 396

+135

(-8; 278)

0.39

1649 ± 375

1749 ± 407

1755 ± 387

+106

(-11; 222)

0.28

0.488

  1. FFM Fat-free mass, ▲ Post – Pre, CI confidence interval, ES Cohen’s d effect size, RMR, resting metabolic rate
  2. p = 2x5 group x time interaction (post-hoc analysis revealed differences between the diet groups were during the post-diet phase only)
  3. *Significantly different from pre-measures (p < 0.05)