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.