Designing a Dyad-Based mHealth Intervention to Improve Adherence to Lifestyle Recommendations in Colorectal Cancer Survivors and Their Family Caregivers

Inclusion Criteria:

* PATIENTS INCLUSION:
* Adults (18 years of age or older)
* Diagnosis of stage I-III colon or rectal cancer
* Undergone curative-intent complete surgical resection (patients who have received non-operative management for rectal cancer may be eligible)
* Completed treatment (i.e., neo-adjuvant, adjuvant cytotoxic chemotherapy, radiation, or surgical resection) at least six months prior
* Own a smartphone with internet access and can receive text messages
* Able to speak, read, and understand English
* Self-report ability to independently engage in physical activity determined by the Physical Activity Readiness questionnaire (PAR-Q), and if indicated obtain physician clearance
* Eastern Cooperative Oncology Group (ECOG) performance status of 0-2 determined via medical chart review
* Presence of a family caregiver (i.e., informal or formal caregiver) willing support the patient and participate in the study
* Able to provide informed consent
* FAMILY CAREGIVER INCLUSION:
* Any adult that resides in the same household as the patient
* Willing to participate in all aspects of the intervention and in the assessments required for those in the wait-list control condition if applicable
* Meets the patient inclusion criteria number 1, 5, 6, and 10
* SMES INCLUSION:
* Medical, radiation, and surgical oncologists; advanced practice providers, registered nurses; dietitians; exercise physiologists; physical therapists, patient navigators and champions/advocates, and social workers with at least 12 months of experience working with CRC survivors

Exclusion Criteria:

* PATIENTS EXCLUSION:
* People with potential contraindications to exercise based on the PAR-Q, for those we are unable to obtain physician clearance
* Planned major surgery during the study period
* Scheduled to receive any form of cancer therapy during study participation
* Concurrent, actively treated other cancer (except non-melanoma skin cancer, in situ cervical cancer or localized prostate cancer treated with surveillance only)
* Self-reported history of severe cardiovascular, respiratory, musculoskeletal disease, or joints problems that preclude moderate physical activity (PA)
* Self-reported history of psychiatric disorders that preclude participation in the study intervention or prevent the patient from giving informed consent
* Concurrent participation in another weight loss, PA, or dietary intervention clinical trial
* Currently pregnant or trying to become pregnant during the study period
* living outside the United States (US) during the study period
* Currently a prisoner
* FAMILY CAREGIVER EXCLUSION:
* The same as the patient exclusion criteria