TABLE 5.
Respiratory calorimetry measurements in pregnant subjects1
| Nonpregnant | First trimester | Second trimester | Third trimester | P2 | |
| V̇O2 (mmol · kg−1 · h−1) | |||||
| Fasted | 9.51 ± 1.02 (8) | 8.88 ± 0.78 (10) | 8.45 ± 0.33 (5) | 8.99 ± 1.19 (10) | NS |
| Fed | 9.56 ± 1.22 (8) | 10.25 ± 1.00 (10) | 9.80 ± 0.73 (5) | 9.40 ± 1.18 (5) | NS |
| V̇CO2 (mmol · kg−1 · h−1) | |||||
| Fasted | 6.56 ± 0.60 (8) | 7.63 ± 0.94 (10)3 | 6.72 ± 0.65 (5)3 | 7.71 ± 1.22 (10) | 0.01 |
| Fed | 8.04 ± 1.01 (8) | 9.07 ± 1.03 (10)34 | 7.75 ± 0.56 (5)3 | 8.26 ± 1.22 (5) | 0.05 |
| RER | |||||
| Fasted | 0.78 ± 0.08 | 0.86 ± 0.05 | 0.79 ± 0.06 | 0.83 ± 0.08 | NS |
| Fed | 0.84 ± 0.07 | 0.88 ± 0.04 | 0.79 ± 0.08 | 0.88 ± 0.08 | NS |
1
All values are means ± SDs; n in parentheses. V̇O2, rate of oxygen consumption; V̇CO2, rate of production of carbon dioxide; RER, respiratory exchange ratio.
2
Obtained by using Kruskal-Wallis one-factor ANOVA.
3
P < 0.05 compared with nonpregnant subjects (Mann-Whitney U test).
4
P < 0.05 compared with second trimester subjects (Mann-Whitney U test).