title: Web-Based Behavioral Intervention Increases Maternal Exercise but Does Not Prevent Excessive Gestational Weight Gain in Previously Sedentary Women.
abstract: Innovative methods are warranted to optimize prenatal outcomes. This study's objective was to determine if a web-based behavioral intervention (BI) can prevent excessive gestational weight gain (GWG) by increasing physical activity (PA).
  
  
  
  Participants were randomized to usual care (UC; n = 21) or BI (n = 24) between 10 to 14 weeks gestation. GWG, PA, and diet were assessed at baseline, mid-, and late pregnancy.
  
  
  
  No differences in GWG or adherence to GWG recommendations presented between groups. Total UC MET-minutes significantly decreased from baseline to late-pregnancy (1,234 ± 372 MET-minutes, P = .013). Mid-pregnancy sustained PA was greater for BI than UC (20-minute PA bouts: 122 ± 106 vs. 46 ± 48 minutes/week, P = .005; 30-minute PA bouts: 74 ± 70 vs. 14 ± 24 minutes/week, P < .001), and greater for BI at mid-pregnancy compared with baseline (20-minute PA bouts: 61.3 ± 21.9; 30-minute PA bouts: 39.6 ± 14.8, both P < .05). BI energy intake at mid-pregnancy significantly increased from baseline (336 ± 127 kcals, P = .04) and was significantly greater than UC (2,503 ± 703 vs. 1,894 ± 594, P = .005).
  
  
  
  Sedentary pregnant women should increase PA but may need additional dietary counseling to prevent excessive GWG.
authors.affiliation: Dept of Food Science and Human Nutrition, Iowa State University, Ames, IA.
authors.forename: Katie
authors.initials: K
authors.lastname: Smith
authors.forename: L
authors.initials: L
authors.lastname: Lanningham-Foster
authors.forename: Amy
authors.initials: A
authors.lastname: Welch
authors.forename: Christina
authors.initials: C
authors.lastname: Campbell
mesh_terms: D000293:Adolescent; D000328:Adult; D001521:Behavior Therapy / Q000379:methods*; D003376:Counseling; D004032:Diet; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D020407:Internet / Q000706:statistics & numerical data*; D008875:Middle Aged; D011247:Pregnancy; D011248:Pregnancy Complications / Q000517:prevention & control*; D011295:Prenatal Care / Q000379:methods*; D057185:Sedentary Behavior; D015430:Weight Gain / Q000502:physiology*; D055815:Young Adult