The association between leisure time physical activity in the year before pregnancy and pre-eclampsia.

UNLABELLED: In order to investigate the association between leisure time physical activity in the year before pregnancy and pre-eclampsia, stratifying for maternal BMI, a prospective study was carried out from 1996 to 1998. Pregnant women attending their first antenatal care visit, were invited to participate in the study. INCLUSION CRITERIA: Danish-speaking, > OR =18 years of age, gestational age <22 weeks, no psychiatric disease, or abuse. The participants (n = 2,793) self-filled a questionnaire at 12-18 gestational weeks. Leisure time physical activity was categorised as sedentary, light and moderate-to-heavy. The results showed that pre-eclampsia occurred in 4.2%, 4.2% and 3.1% of women with sedentary, light and moderate-to-heavy leisure time physical activity, respectively. Although we found a tendency towards a lower risk of pre-eclampsia in women with the highest degree of physical activity during leisure time, especially in overweight women, no significant associations were found. It was concluded that leisure time physical activity the year before pregnancy does not protect against pre-eclampsia.