Optimizing a mHealth Physical Activity Intervention With Mindful Awareness Lessons in Breast Cancer Survivors

The primary purpose of the present study is to apply MOST methodology to determine which types of social support and mindfulness training intervention components optimally increase MVPA adoption and maintenance in Breast Cancer Survivors (BCS) in a 24-week intervention with a 48-week follow-up. The researchers will also examine the effects of changes in MVPA on symptom burden, time spent in intensities of other activities (i.e. light and sedentary), and sleep quality and duration. Aim 1: To identify which components from four mHealth components under consideration for inclusion meaningfully contribute to improvements in MVPA at 24 and 48 weeks. Aim 2: To examine how changes in MVPA, as a result of the 4 components, may influence additional health behaviors and outcomes including: a) symptom burden (i.e. fatigue, depression, anxiety); b) time spent i n other activity intensities (i.e. light, sedentary time); and c) sleep duration and quality. Aim 3: To examine potential mediators (i.e. adherence, psychosocial factors such as post-traumatic growth, self-compassion, self-efficacy, and goal-setting) and moderators (i.e., age, time since diagnosis) of the four intervention components on MVPA.

Sex

Female

Minimum age

18 Years

Inclusion Criteria:

For BCS

* Female, age 18 years or older
* Stage I-III breast cancer diagnosis within the past 5 years
* Diagnosis of cancer between 18-39 years and within the past 5 years
* ≥3 months post-completion of primary treatment (i.e., surgery, chemotherapy, and/or radiation); may still be undergoing endocrine or hormone therapies
* Self-report engagement in \<60 min/week of MVPA
* Score of 0 on all positive statement(s) of the Physical Activity Readiness Questionnaire (PAR-Q)18 or willingness to obtain medical clearance from a primary care physician or oncologist
* Internet access and smartphone ownership
* Fluency in spoken and written English
* Willingness to find a buddy (someone who knows about their cancer and participation in this study and who is willing to participate by supporting them during the 24-week study), if assigned to that condition

For "Buddies"

* Friend, co-worker, caregiver or family member of a participating BCS
* Age 18 years or older
* Score of 0 on all positive statement(s) of the Physical Activity Readiness Questionnaire (PAR-Q)18 or willing to obtain medical clearance from a primary care physician
* Internet access and smartphone ownership
* Fluency in spoken and written English
* Willingness to share their Fitbit data with the study team

Exclusion Criteria:

* Absolute contraindications to exercise (i.e., acute myocardial infarction, severe orthopedic conditions), metastatic disease, or planned elective surgery
* Currently pregnant or plans to become pregnant
* Plans to move out of the United States in next 18 months
* Current enrollment in another dietary or physical activity trial
* Inability to provide informed consent
* Prisoners or other detained individuals

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