Dyadic Yoga Intervention in Improving Physical Performance and Quality of Life in Patients With Stage I-IV Non-small Cell Lung or Esophageal Cancer Undergoing Radiotherapy and Their Caregivers

Inclusion Criteria:

* PATIENT ONLY: Diagnosed with stage I-IV non-small cell lung cancer (NSCLC) or esophageal cancer and going to receive at least 3 weeks of thoracic radiotherapy (RT)
* PATIENT ONLY: Eastern Cooperative Oncology Group (ECOG) performance status of ≤ 2
* PATIENT ONLY: Able to read, write and speak English
* PATIENT ONLY: Able to provide informed consent
* PATIENT ONLY: Having a family caregiver (e.g., spouse, sibling, adult child) who assists the patient during the cancer treatment (e.g., emotional support, transportation, meal preparation, care coordination, etc) per patient self-report. Note, patients must identify a family caregiver; however, the participation of the family caregiver is optional. For caregivers to be eligible, they must be at least 18 years old; able to read, write and speak English; and able to provide informed consent. Family caregivers may consent to participate in the intervention and caregiver assessments or only the assessments based on their preference.

Exclusion Criteria:

* PATIENT ONLY: Who have regularly (self-defined) participated in a mind-body practice in the year prior to diagnosis
* PATIENT ONLY: Patients who metastatic disease involving the central nervous system