The Relationship of Objectively Measured Physical Activity and Sedentary Behaviour with Gestational Weight Gain and Birth Weight

Table 1

Characteristics of the study sample.

	Total population; ()
Age, years, mean (SD)	29.6	(3.8)
Ethnicity, (%)
White European	95	86%
Non-White	16	14%
Nulliparous, (%)	81	73%
BMI at 15 wks (kg/m^2), mean (SD)	27.0	(5.5)
BMI category at 15 weeks, (%)
Normal weight	54	49%
Overweight	25	22%
Obese	32	29%
Gestational age at birth, weeks, mean (SD)	40.2	(1.2)
Gestational weight gain, kg, mean (SD)	10.3	(4.2)
Gestational weight gain per week, kg, mean (SD)	0.55	(0.22)
Birth weight, g, mean (SD)	3541	(429)
Total PA at 15 wks, mins/day, mean (SD)	286	(103)
% of registration time		35%
Total PA at 32–35 wks, mins/day, mean (SD)	273	(103)
% of registration time		35%
MVPA at 15 wks, min/day, mean (SD)	24	(16)
% of registration time		3%
MVPA at 32–35 wks, min/day, mean (SD)	18	(22)
% of registration time		2%
Sedentary behaviour at 15 wks, min/day, mean (SD)	530	(170)
% of registration time		65%
Sedentary behaviour at 32–35 wks, min/day, mean (SD)	505	(173)
% of registration time		65%

MVPA: moderate to vigorous physical activity; PA: physical activity; SD: standard deviation.