Table 3

Physical activity participation from the Pregnancy Physical Activity Questionnaire

Mean±SD* in MET*hours/week	Prepregnancy	First trimester	Second trimester	Third trimester
Total energy expenditure	266.1±0.7	215.8±0.5^†	192.6±1.3^†	186.9±1.8^‡
By intensity
Sedentary	75.8±0.3	73.9±0.3	47.4±0.4	46.9±0.6
Light	95.5±0.3	77.9±0.3	88.8±1.0	90.3±0.9
Moderate	87.6±0.5	60.9±0.5	54.2±0.5	48.3±0.7
Vigorous	7.2±0.08	3.1±0.05^†	2.3±0.05^†	1.4±0.03^†
By type
Household/care giving	89.1±0.4	72.7±0.4	91.8±0.9	91.5±0.9
Occupational activity^§	103.0±0.5	85.8±0.6	25.4±0.8	19.8±0.7
Sports and exercise	18.4±0.1	11.7±0.1^†	12.5±0.1^‡	11.8±0.1^‡
Transportation	29.0±0.2	23.5±0.1	30.9±0.5	30.0±0.5

*Mean of the 25 imputed datasets.
†Different from preceding period at p<0.0001 (with Bonferroni correction).
‡Different from preceding period at p<0.05 (with Bonferroni correction).
§Excluding women not working/studying/doing voluntary work (n=1563–1749).
MET, metabolic equivalent of task.