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Table 2 Oxygen consumption, carbon dioxide production and energy expenditure of non-pregnant (n = 22) and pregnanta (n = 22) women at rest and when performing standardised activitiesb

From: MET-values of standardised activities in relation to body fat: studies in pregnant and non-pregnant women

Activity Oxygen consumption (ml/min) p c Carbon dioxide production (ml/min) p c Energy expenditure (kJ/min) p c
  Non-pregnant Pregnanta   Non-pregnant Pregnanta   Non-pregnant Pregnanta  
Resting 208 ± 25 247 ± 30 0.000029 169 ± 2 192 ± 23 0.00078 4.10 ± 0.50d 4.85 ± 0.59e 0.000037
Sitting 250 ± 25 264 ± 42 0.184 232 ± 23 249 ± 44 0.120 5.15 ± 0.50 5.44 ± 0.88 0.156
Cycling
 30 watts 694 ± 51 717 ± 56 0.157 620 ± 60 660 ± 48 0.020 14.1 ± 1.1 14.7 ± 1.1 0.096
 60 watts 980 ± 62 1007 ± 65 0.177 936 ± 63 995 ± 81 0.010 20.3 ± 1.3 21.0 ± 1.4 0.082
Walking
 3.2 km/h 699 ± 110 731 ± 105 0.332 614 ± 107 636 ± 93 0.470 14.2 ± 2.3 14.9 ± 2.1 0.355
 5.6 km/h 1082 ± 179 1194±139f 0.028 1012 ± 193 1122±167f 0.054 22.3 ± 3.8 24.6 ± 3.0f 0.032
Running
 8 km/h 1958±290f 1948±200g 0.931 2045±359f 2041±301g 0.980 41.3 ± 6.2f 41.2 ± 4.6g 0.943
  1. aIn gestational week 32
  2. bValues are means ± standard deviations
  3. cp for difference between groups using unpaired t-test
  4. dRepresenting the basal metabolic rate and equivalent to 3.12 ± 0.30 ml O2/kg/min and 3.71 ± 0.33 kJ/kg/h
  5. eRepresenting the basal metabolic rate and equivalent to 3.34 ± 0.25 ml O2/kg/min and 3.94 ± 0.30 kJ/kg/h
  6. fn = 21
  7. gn = 9