Lifestyle Intervention of Food and Exercise for Lymphoma Survivors

Inclusion Criteria: 1. 18 years of age or older 2. Any sex/gender 3. Able to provide consent 4. Able to read or understand English or Spanish 5. Diagnosis of untreated Non-Hodgkin or Hodgkin lymphoma, requiring at least 6 cycles of chemotherapy, being treated with one of the following therapies at discretion of PIs: 1. R-CHOP or R-CHOP-like regimen 2. BR 3. BV-AVD or ABVD or checkpoint inhibitor+AVD 6. ECOG Performance Status grade of \<2 a. PI approval needed if ECOG = 2 7. Approval from treating oncologist, confirmed via email or in writing 8. Delivery of chemotherapy treatments at one of the following institutions: 1. Sylvester Comprehensive Cancer Center (including satellite/network sites) 2. University of Miami Hospital/UHealth Tower 9. Internet access on a smart phone, tablet, or computer 10. Willing to be randomized to a Mediterranean diet/home-based physical activity intervention or waitlist-control group. Exclusion Criteria: 1. Individuals younger than 18 years of age 2. Unable to provide consent 3. Unable to read or understand English or Spanish 4. Any contraindication for diet change or exercising as determined by physician 5. Currently following a vegan or ketogenic diet, or consuming more than 5 servings of fruit and vegetables per day for the prior month 6. Engaging in \>150 minutes of moderate to vigorous physical activity on average per week for the prior month 7. History of dementia or major psychiatric disease 8. History of recent (≤1 yr) stroke, myocardial infarction or congestive heart failure