Strong Hearts: A Remote, App-Enabled, Exercise Program for Patients With Congenital Heart Disease (Strong Hearts App)

The participant will either begin at the easiest variation of each strength exercise (level A), or will be placed at a specific level for each strength exercise based on their assessment with physical therapy. Participants can progress to the next level of difficulty of a specific strength exercise based on their rating of perceived exertion (RPE) with the opportunity to move to the next level if they have RPE score of 6 or less and if their heart rates are at goal. Each participant will be provided with heart rate ranges based on the heart rate reserve (HRR) method using their baseline resting and peak heart rates obtained during their cardiopulmonary exercise testing (CPET) or percent predicted heart rate based on age if CPET is not available. HRR goals will be set individually for patients and adjusted per protocol to guide effort.