Table.
Body Composition and Energy Metabolism at Baseline and Changes During 8 Weeks of Overfeeding
| Baseline |
Change from Baselinea |
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|---|---|---|---|---|---|---|---|---|
| Protein Diet Group, Mean (SD)b |
P Valuec | Protein Diet Group, Mean (95% CI) |
P Valuec | |||||
| Low: 5% | Normal: 15% | High: 25% | Low: 5% | Normal: 15% | High: 25% | |||
| Age, y | 22.9 (2.75) | 22.9 (5.49) | 26.8 (1.98) | .08 | ||||
|
| ||||||||
| Sex, No. | ||||||||
| Male | 5 | 6 | 5 | |||||
|
| ||||||||
| Female | 3 | 3 | 3 | |||||
|
| ||||||||
| Race, No. | ||||||||
| White | 4 | 0 | 3 | |||||
|
| ||||||||
| Black | 3 | 8 | 5 | |||||
|
| ||||||||
| Asian | 1 | 1 | 0 | |||||
|
| ||||||||
| Weight, kg | 69.1 (11.6) | 77.6 (13.0) | 76.0 (15.4) | .40 | 3.16 (1.88 to 4.44) | 6.05 (4.84 to 7.26) | 6.51 (5.23 to 7.79) | .002 |
|
| ||||||||
| Fat mass, kg | 16.6 (5.07) | 18.3 (7.40) | 19.6 (6.38) | .66 | 3.66 (2.82 to 4.49) | 3.45 (2.67 to 4.24) | 3.44 (2.60 to 4.27) | .91 |
|
| ||||||||
| Lean body mass, kg | 53.2 (10.3) | 59.9 (12.5) | 57.1 (13.5) | .53 | −0.70 (−1.50 to 0.10) | 2.87 (2.11 to 3.62) | 3.18 (2.37 to 3.98) | <.001 |
|
| ||||||||
| Energy expenditure, kJ/d | ||||||||
| Total | 9334 (1505) | 9096 (2207) | 8736 (1893) | .82 | 176 (−740 to 1095) | 2186 (1321 to 3051) | 1898 (974 to 2813) | .007 |
|
| ||||||||
| Resting | 6475 (1413) | 6207 (1069) | 6153 (1187) | .85 | −86.1 (−343 to 171) | 669 (426 to 911) | 949 (690 to 1204) | <.001 |
|
| ||||||||
| Physical activity leveld | 1.48 (0.31) | 1.48 (0.29) | 1.43 (0.26) | .94 | 0.021 (−0.13 to 0.18) | 0.16 (0.019 to 0.31) | 0.079 (−0.078 to 0.23) | .38 |
|
| ||||||||
| Non–resting energy expenditure, kJ/d | 1924 (1473) | 1979 (1761) | 1706 (1558) | .12 | 245 (−668 to 1158) | 1296 (435 to 2157) | 756 (−156 to 1669) | .24 |
|
| ||||||||
| Protein, g/d | 85.2 (9.2) | 92.0 (18.0) | 93.3 (19.7) | .57 | −38.6 (−51.9 to −25.2) | 47.6 (34.9 to 60.2) | 135 (121 to 148) | <.001 |
|
| ||||||||
| Energy intake, kJ/d | 9457 (1047) | 10357 (2139) | 10395 (2194) | .53 | 3866 (209) | 4088 (209) | 3783 (222) | .13 |
a
Data for change from baseline were adjusted for age, sex, and baseline values.
b
Unless otherwise indicated.
c
Calculated using analysis of variance.
d
Calculated as total energy expenditure divided by resting energy expenditure.