Inclusion Criteria:  Diagnosed with Hodgkin or non-Hodgkin lymphoma. >= 18 years old. Are between 2-5 years after completing anti-cancer therapy and with no evidence of disease. Intermediate (4-5) to high ( >= 6) risk of cardiovascular risk factors based on six key variables: Age 30 to 50 years (y) [2]) and >= 50y [3]; anthracycline dose >250mg/m ^ 2 [1]; hypertension [2]; diabetes [2]; smoking [1]; and chest radiation [1]). Able to understand and sign the informed consent document. Physically able and willing to complete all study procedures.  Exclusion Criteria:  Have overt cardiovascular disease within 6 months (e.g. myocardial infarction, stroke, angina). Have contraindications to exercise. Participate in structured exercise (>60 minutes/week). Female patients who are pregnant or planning to become pregnant.