title: Design of the New Life(style) study: a randomised controlled trial to optimise maternal weight development during pregnancy. [ISRCTN85313483].
abstract: BACKGROUND
  Preventing excessive weight gain during pregnancy is potentially important in the prevention of overweight and obesity among women of childbearing age. However, few intervention studies aiming at weight management during pregnancy have been performed and most of these interventions were not as successful as expected. In this paper the design of the New Life(style) study is described as well as the content of the individually tailored intervention program, which focuses on controlling weight development during pregnancy.
  
  
  METHODS
  The effectiveness of the New Life(style) intervention program versus usual care by midwives is evaluated in a randomised controlled trial. Women who expect their first child and visit one of the participating midwifery practices are included. The intervention is standardised in a protocol and executed by trained counsellors with the women who are randomised in the intervention group. During 5 sessions--at 18, 22, 30 and 36 weeks of pregnancy and at 8 weeks postpartum--individual weight gain is discussed in relation to weight gain guidelines for pregnant women of the American Institute of Medicine. Counsellors coach the women to maintain or optimise a healthy lifestyle, in a period of drastic physical and mental changes. Data is collected at 15, 25, 35 weeks of pregnancy and at 6, 26, and 52 weeks after delivery. Primary outcome measures are body weight, BMI, and skinfold thickness. Secondary outcome measures include physical activity, nutrition and blood levels of factors that are associated with energy homeostasis.
  
  
  CONCLUSIONS
  Results of the current RCT will improve the knowledge of determinants of weight gain during pregnancy, weight retention after childbirth and of the effectiveness of the intervention program that is described. Caregivers and researchers in the field of health promotion are offered more insight in specific elements of the New Life(style) intervention program.
authors.affiliation: Department of Public and Occupational Health, EMGO-Institute, VU University Medical Center, Amsterdam, The Netherlands. e.althuizen@vumc.nl
authors.forename: Ellen
authors.initials: E
authors.lastname: Althuizen
authors.forename: Mireille N M
authors.initials: MN
authors.lastname: van Poppel
authors.forename: Jacob C
authors.initials: JC
authors.lastname: Seidell
authors.forename: Carla
authors.initials: C
authors.lastname: van der Wijden
authors.forename: Willem
authors.initials: W
authors.lastname: van Mechelen
mesh_terms: D003376:Counseling; D005260:Female; D006293:Health Promotion; D006801:Humans; D008429:Maternal Welfare; D008880:Midwifery; D009426:Netherlands; D009765:Obesity / Q000517:prevention & control*; D050177:Overweight; D010353:Patient Education as Topic; D011181:Postnatal Care / Q000379:methods; D011247:Pregnancy; D011248:Pregnancy Complications / Q000517:prevention & control*; D011256:Pregnancy Outcome; D011295:Prenatal Care / Q000379:methods; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D012107:Research Design; D012885:Skinfold Thickness; D015430:Weight Gain