Assessing Physical Fitness in Cancer Patients With Cardiopulmonary Exercise Testing and Wearable Data Generation

Inclusion Criteria:

* Patients with solid tumor or hematologic malignancies who are planning to receive a cycle of cytotoxic chemotherapy or patients who are planning to receive stem cell transplant.
* Age ≥ 18
* At least 6 weeks out from surgical resection
* Presence of working email address
* Access to internet at home and access to electronic device(s) capable of charging and syncing the Fitbit
* Ability to read and understand English
* Ability to understand and comply with study procedures including wearing Fitbit for the entire length of the study
* Approval of attending oncologist for participation in the study
* Hb ≥ 8 g/dL (most recent lab draw)
* Willingness and ability to provide written informed consent

Exclusion Criteria:

* Dementia, altered mental status, or psychiatric condition that would prohibit the understanding or rendering of informed consent
* Presence of cardiac disease including acute MI within past 6 weeks, unstable angina, uncontrolled arrhythmias causing symptoms, active endocarditis, myocarditis, or pericarditis,symptomatic aortic stenosis, uncontrolled heart failure, syncope in the past 6 weeks, severe untreated hypertension at rest (\>180 mmHg systolic, \>100 mmHg diastolic)
* Acute pulmonary embolism or thrombosis of lower extremities in the past 6 weeks
* Uncontrolled asthma
* Pulmonary edema
* Suspected dissecting aneurysm
* Room air desaturation at rest \</= 88%
* Respiratory failure
* Acute noncardiopulmonary disorder that may be aggravated by exercise
* Mental impairment leading to inability to cooperate with instructions
* Orthopedic impairment that compromises exercise performance