title: The relationship of objectively measured physical activity and sedentary behaviour with gestational weight gain and birth weight.
abstract: OBJECTIVE
  To evaluate the relationship of physical activity (PA) and sedentary behaviour with gestational weight gain (GWG) and birth weight.
  
  
  METHODS
  Combined data from two prospective studies: (1) nulliparous pregnant women without BMI restrictions and (2) overweight and obese pregnant women at risk for gestational diabetes.
  
  
  METHODS
  Daily PA and sedentary behaviour were measured with an accelerometer around 15 and at 32-35 weeks of gestation. The association between time spent in moderate-to-vigorous PA (MVPA) and in sedentary activities with GWG and birth weight was determined. Main outcome measures were GWG between 15 and 32 weeks of gestation, average GWG per week, and birth weight.
  
  
  RESULTS
  We studied 111 women. Early in pregnancy, 32% of women spent ≥ 30 minutes/day in at least moderate PA versus 12% in late pregnancy. No significant associations were found between time spent in MVPA or sedentary behaviour with GWG or birth weight.
  
  
  CONCLUSIONS
  We found no relation between MVPA and sedentary behaviour with GWG or birth weight. The small percentage of women meeting the recommended levels of PA indicates the need to inform and support pregnant women to maintain regular PA, as there seems to be no adverse effect on birth weight and maintaining PA increases overall health.
authors.affiliation: Department of Obstetrics, Gynaecology and Fertility, Faculty of Medicine, University of Amsterdam (AMC-UvA), Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands ; Department of Obstetrics and Gynaecology, Faculty of Medicine, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands.
authors.forename: Anneloes E
authors.initials: AE
authors.lastname: Ruifrok
authors.affiliation: Department of Public and Occupational Health, EMGO Institute for Health and Care Research, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands.
authors.forename: Ellen
authors.initials: E
authors.lastname: Althuizen
authors.affiliation: Department of Public and Occupational Health, EMGO Institute for Health and Care Research, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands.
authors.forename: Nicolette
authors.initials: N
authors.lastname: Oostdam
authors.affiliation: Department of Public and Occupational Health, EMGO Institute for Health and Care Research, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands.
authors.forename: Willem
authors.initials: W
authors.lastname: van Mechelen
authors.affiliation: Department of Obstetrics, Gynaecology and Fertility, Faculty of Medicine, University of Amsterdam (AMC-UvA), Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands.
authors.forename: Ben Willem
authors.identifier: 0000-0001-8337-550X
authors.initials: BW
authors.lastname: Mol
authors.affiliation: Department of Obstetrics and Gynaecology, Faculty of Medicine, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands.
authors.forename: Christianne J M
authors.initials: CJ
authors.lastname: de Groot
authors.affiliation: Department of Public and Occupational Health, EMGO Institute for Health and Care Research, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands.
authors.forename: Mireille N M
authors.initials: MN
authors.lastname: van Poppel
mesh_terms: D061725:Accelerometry; D000328:Adult; D001724:Birth Weight / Q000502:physiology*; D005260:Female; D006801:Humans; D009043:Motor Activity / Q000502:physiology*; D009765:Obesity / Q000150:complications / Q000503:physiopathology; D050177:Overweight / Q000150:complications / Q000503:physiopathology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000503:physiopathology*; D011446:Prospective Studies; D057185:Sedentary Behavior; D015430:Weight Gain / Q000502:physiology*