CAPACITY (Cardiac Amyloidosis and Physical ACtivITY) Study

Inclusion Criteria: * Age \> 18 * New York Heart Association (NYHA) Class I-III Heart Failure * Able to Exercise * On stable treatment for their cardiac amyloidosis or under active surveillance * Life expectancy of at least 6 months * Ability to understand and the willingness to sign a written informed consent document in English, and the willingness/ability to comply with the protocol activities * Participant must be able and willing to follow the cardiac rehabilitation activities Exclusion Criteria: * Inability to provide informed consent * Inability to commit to in-person supervised exercise sessions for three one-hour sessions a week for 12 weeks * NYHA Class IV Heart Failure * Pulmonary disease requiring home oxygen * Gait instability or history of prior falls * In the opinion of the Principal Investigator, have a clinically significant comorbid disease that is likely to affect the ability of the patient to complete the trial, interfere with their ability with measurement of self-reported outcomes.