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

Nutrition & Metabolism

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

Activity	Oxygen consumption (ml/min)		p ^c	Carbon dioxide production (ml/min)		p ^c	Energy expenditure (kJ/min)		p ^c
	Non-pregnant	Pregnant^a		Non-pregnant	Pregnant^a		Non-pregnant	Pregnant^a
Resting	208 ± 25	247 ± 30	0.000029	169 ± 2	192 ± 23	0.00078	4.10 ± 0.50^d	4.85 ± 0.59^e	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±139^f	0.028	1012 ± 193	1122±167^f	0.054	22.3 ± 3.8	24.6 ± 3.0^f	0.032
Running
8 km/h	1958±290^f	1948±200^g	0.931	2045±359^f	2041±301^g	0.980	41.3 ± 6.2^f	41.2 ± 4.6^g	0.943

^aIn gestational week 32
^bValues are means ± standard deviations
^cp for difference between groups using unpaired t-test
^dRepresenting the basal metabolic rate and equivalent to 3.12 ± 0.30 ml O₂/kg/min and 3.71 ± 0.33 kJ/kg/h
^eRepresenting the basal metabolic rate and equivalent to 3.34 ± 0.25 ml O₂/kg/min and 3.94 ± 0.30 kJ/kg/h
^fn = 21
^gn = 9