Healthy Bellies - Intervention Program During Pregnancy on Women and Newborn

Inclusion Criteria: * Do not have any medical or obstetric contraindication for physical exercise Exclusion Criteria: * Haemodynamically significant heart disease; * restrictive lung disease; * incompetent cervix/cerclage; * multiple gestation at risk for premature labor; * persistent second or third trimester bleeding; * placenta praevia after 26 weeks gestation; * premature labor during the current pregnancy; * ruptured membranes; * pregnancy induced hypertension; * severe anaemia; * unevaluated maternal cardiac arrhythmia; * chronic bronchitis; * poorly controlled type I diabetes; * extreme morbid obesity; * extreme underweight (body mass index \<12); * history of extremely sedentary lifestyle; * intrauterine growth restriction in current pregnancy; * poorly controlled hypertension/pre-eclampsia; * orthopaedic limitations; * poorly controlled seizure disorder; * poorly controlled thyroid disease; heavy smoker).