This study investigated whether, in a general obstetric population, exercise in pregnancy affects the timeliness of delivery.
The hypothesis was that maternal exercise would not raise the risk of preterm birth.
A community cohort of 557 prenatal patients was followed up until the time of delivery.
Data were collected on exercise in each trimester : none, low-moderate (<1000 kcal [4184 kJ]/wk in energy expenditure), or heavy (=1000 kcal/wk).
Timely delivery was adopted as an outcome criterion.
Thus, in the analysis, a term birth was treated as optimal and survival techniques were used to estimate risks for both preterm and postdates delivery.
No association was found between low-moderate exercise and gestational length.
Heavier exercise appeared to reduce, rather than raise, the risk of preterm birth.
The adjusted relative risk among conditioned heavy exercisers was 0.11 (95% confidence inter=0.02,0.81).
After term, conditioned heavy exercisers delivered faster than nonexercisers.
The most important finding was the lack of evidence that vigorous maternal exercise is a risk factor for preterm delivery.
A promising finding was that conditioned heavy exercisers have timely deliveries.
Mots-clés Pascal : Exercice physique, Gestation, Prématurité, Epidémiologie, Facteur risque, Nouveau né, Homme, Femelle, Etats Unis, Amérique du Nord, Amérique, Nouveau né pathologie
Mots-clés Pascal anglais : Physical exercise, Pregnancy, Prematurity, Epidemiology, Risk factor, Newborn, Human, Female, United States, North America, America, Newborn diseases
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0491608
Code Inist : 002B20F02. Création : 19/02/1999.