Physical Activity and Sedentary Behavior During Pregnancy

Inclusion Criteria: * Pregnant women of more of 18 years and who are being monitored for pregnancy in the Clermont-Ferrand metropolitan area, * Planned to give birth in a maternity unit localized in Clermont-Ferrand metropolitan area (CHU Estaing or Clinique de la Chataigneraie), * Agreeing to be randomized, to follow the physical activity program offered in the Clermont-Ferrand metropolitan area, and to follow up as part of the study, * Able to give informed consent to participate in the research, * Affiliated to a social security scheme * And between 14+0d and 21+6d weeks of gestation. Non inclusion Criteria: * Women under guardianship, curators, deprived of liberty or under court protection, * With a history of recurrent miscarriage, * Presenting a multiple pregnancy, * Hemoglobinemia \<9g/dL or symptomatic anemia, * Presenting eating disorders or a BMI ≤ 18.5 or a BMI ≥ 40, * With orthopedic limitations, * Presenting cardiovascular or pulmonary disease, * Uncontrolled thyroid disease, * Presenting a high level of smoking, * With significant health problems, * Premature rupture of membranes, * Premature labor during this pregnancy or a history of at least 2 premature births, * Persistent vaginal bleeding, * Cervical incompetence, * Evidence of intrauterine growth restriction, * Uncontrolled epilepsy, * Diabetes (previous or gestational, diagnosed in the 1st trimester) or chronic hypertension, * Or having a planned home birth.