The following criteria is provided for health care professionals.

Inclusion Criteria:

* Age ≥65 years
* Lymphoma, leukemia, or myeloma with commercial FDA-approved CAR-T delivery planned for ≥4 weeks following enrollment
* Eastern Cooperative Oncology Group (ECOG) performance status 0-2
* Able to read and speak English fluently
* Capable of providing informed consent
* For optional, tele-supervised aerobic training procedure involving stationary bicycle delivery, participants must live within a 2-hour drive of Moffitt Cancer Center as determined via Google Maps.

Exclusion Criteria:

* Regular engagement in Resistance training (2x/week targeting all major muscle groups)
* Screen failure for exercise safety based on Physical Activity Readiness Questionnaire (PAR-Q) and Patient-Reported Measurement Information System (PROMIS) screening questions
* Underlying unstable cardiac or pulmonary disease or symptomatic cardiac disease (New York Heart Association functional class III or IV).
* Recent fracture or acute musculoskeletal injury that precludes ability to participate in RT using body weight
* Numeric pain rating scale of ≥ 7 out of 10
* Myopathic or rheumatologic disease that impacts physical function
* Cognitive, visual, or auditory limitations that preclude safe engagement in remotely-supervised resistance training sessions or independent aerobic exercise (as determined by patients' treating oncologists and specified in clinic notes outlining disease history).