Inactive Lifestyles Among Young Children With Innocent Murmurs or Congenital Heart Disease, Regardless of Disease Severity or Treatment.

Background: Sedentary lifestyle morbidities are common among children with congenital heart disease (CHD). Understanding the physical activity trajectory from early childhood could enhance timing and effectiveness of interventions.

Methods: We recruited 154 children (56% male) at 12 to 47 months of age for this prospective, longitudinal, observational study.