The various designs and instruments used and the week or trimester of assessment limit
comparisons of studies on the practice of exercise during pregnancy. However, studies investigating
the type of exercise have unanimously reported that walking was the most common
activity [8,16,28–30]. Walking is an affordable exercise that requires no special equipment or
facility. There is no contraindication from its practice during pregnancy, except for the general
contraindications for exercise during pregnancy [6]. Several clinical trials have used walking as
an intervention to assess the effects of exercise on maternal and perinatal outcomes and have
found it to be an effective intervention [31–34].