title: The impact of pregnancy on physical activity level.
abstract: OBJECTIVE
  The purpose of this study was to compare women's levels of physical activity during early pregnancy and during the year before pregnancy, and to identify characteristics associated with discontinuing sports and exercise among women previously active during the year before pregnancy.
  
  
  METHODS
  Data collected from 1,737 women enrolled in a prospective cohort study and who had no contraindications for exercise were included in this analysis. Measures of physical activity (including household and care-giving activities, active living and sports and exercise activities) during early pregnancy were compared to the year before pregnancy. Log binomial regression was used to identify factors associated with discontinuing sports and exercise during pregnancy.
  
  
  RESULTS
  There was a statistically significant decrease in all summary measures of physical activity during early pregnancy. The largest decreases were observed in sports and exercise activity. Among women active before pregnancy, age <35 years, multiparity, less than university education, pre-pregnancy body mass index (BMI) > or = 30 kg/m(2) and lower levels of pre-pregnancy exercise were associated with discontinuing sports and exercise activities during pregnancy.
  
  
  CONCLUSIONS
  Most women reduced their physical activity level during the first 20 weeks of pregnancy compared with their level of activity during the year prior to pregnancy, particularly for sports and exercise, although a small proportion of women in this study actually increased their activity in this area during early pregnancy. Participation in sports and exercise activity during pregnancy is potentially modifiable and could favorably impact perinatal health and maternal post-partum weight. The results of this study suggests that pregnancy is an event that leads to a decrease in physical activity.
authors: Perinatal Epidemiology Research Unit, Department of Obstetrics and Gynaecology, Dalhousie University and the IWK Health Centre, Halifax, NS, Canada B3K 6R8.
authors: Deshayne B
authors: DB
authors: Fell
authors: K S
authors: KS
authors: Joseph
authors: B Anthony
authors: BA
authors: Armson
authors: Linda
authors: L
authors: Dodds
mesh_terms: D000328:Adult; D016010:Binomial Distribution; D015992:Body Mass Index; D004522:Educational Status; D015444:Exercise; D005260:Female; D015438:Health Behavior; D006801:Humans; D009043:Motor Activity; D009674:Nova Scotia; D010298:Parity; D011247:Pregnancy / Q000502:physiology*; D011446:Prospective Studies; D012907:Smoking; D012959:Socioeconomic Factors; D013177:Sports