The purpose of this study is to verify if postprandial walks are effective in obese pregnant women, as regards to gestational weight gain and typical diseases of that period, as gestational diabetes and preeclampsia. Perinatal outcomes will be observed, such as macrosomia, shoulder dystocia and fetal death.

Inclusion Criteria:

• Age between 18 and 40 years;
• Gestational age ≤ 20 weeks, calculated from the last menstrual period and confirmed by the first ultrasound scan;
• Obesity - body mass index ( BMI ) ≥ 30 kg/m2, based on the weight before pregnancy, reported by pregnant women no more than 5 kg below measured at admission to the study;
• Physically inactive - according to the International Physical Activity Questionnaire (IPAC);
• Single pregnancy.

Exclusion Criteria:

• Kidney disease or collagen;
• Previous history of GDM;
• Diabetes type 1 or type 2;
• Hypertensive disorders related to pregnancy;
• Hemodynamic instability;
• Vaginal bleeding;
• Visual, auditory or cognitive impairment.