BACKGROUND
Little is known about how leisure time physical activity (LTPA) influences gestational weight gain (GWG) among body mass index (BMI) categories. The purpose of this study was to examine the relationship between pregnancy LTPA and the proportion of normal, overweight, and obese women who meet GWG recommendations.
METHODS
Participants included 449 subcohort women from the Pregnancy Outcomes and Community Health (POUCH) Study. LTPA was collapsed into three categories [(None, <7.5 kcal/kg/wk (low), ≥7.5 kcal/kg/wk (recommended)]. GWG was categorized according to IOM recommendations (low, recommended or excess). Chi-square and logistic regression analyses were used to evaluate relationships among LTPA, BMI, and GWG.
RESULTS
Overweight women were more likely to have high GWG vs. normal weight women (OR=2.3, 95% C.I. 1.3, 4.0). Obese women were more likely to experience low GWG (OR=7.3, 95% C.I. 3.6, 15.1; vs. normal and overweight women) or excess GWG (OR=3.5, 95% C.I. 1.9, 6.5; vs. normal weight women). LTPA did not vary by pre-pregnancy BMI category (p=0.55) and was not related to GWG in any pre-pregnancy BMI category (p=0.78).
CONCLUSIONS
Regardless of pre-pregnancy BMI, LTPA did not affect a woman’s GWG according to IOM recommendations. Results may be due to LTPA not differing among BMI categories.