Training in Exercise Activities and Motion for Growth (TEAM 4 Growth) RCT

Inclusion Criteria: * hospitalized infants with HLHS or other single RV anomalies * \>=37 weeks gestation * \<=35 days of age * planned Norwood procedure (or hybrid leading to Norwood within 35 days) * parent or guardian willing to comply with protocol and provide written informed consent Exclusion Criteria: * birthweight \<3rd percentile for gestational age * chromosomal or recognizable phenotypic syndrome of non-cardiac congenital abnormalities associated with growth failure (for example Trisomy, Noonan, or Turner syndromes) * non-cardiac diagnosis associated with growth failures * listed for cardiac transplant * anticipated discharge within 14 days of screening