When anyone, whether it be an adult, child or infant has a medical disability, they require more rest than someone who does not have a disability or disorder. Even eating a meal or taking a bath may require more energy for someone who suffers from a medical disorder. Especially for young infants, each time a mother has the infant perform a duty like feeding, bathing or any other activity, the infant should rest before and after the activity so that he or she has enough strength during the activity.
Combining too many activities into a short amount of time will make anyone with a heart condition to become very tired and weak. Each activity should be schedule for an infant with periods of rest in between.