Web-based Lifestyle Program, mHealth and EMA Intervention, to Improve Weight Loss in Rural Stage I-III Postmenopausal Breast and Endometrial Cancer Survivors, HERO-C Trial

PRIMARY OBJECTIVES: I. To determine the feasibility of an mHealth + EMA intervention in addition to the web-based lifestyle program with remote outcome assessments among rural breast and endometrial cancer survivors. (Aim 1) Ia. To identify rural cancer survivors' perspectives and unique needs/challenges of participating in a web-based lifestyle program via focus groups pre- and post-intervention (n=20); (Aim 1a) Ib. To determine the feasibility of mHealth + EMA among early non-responders (week 5-26); (Aim 1b) Ic. To determine the feasibility of remote outcome assessments. (Aim 1c) II. To determine the preliminary efficacy of the additional mHealth + EMA intervention for early non-responders from the web-based lifestyle program (within-person change from week 5-26). (Aim 2) EXPLORATORY OBJECTIVE: I. To explore the differences in metabolomic, inflammatory, behavioral, and psychosocial factors between early responders and early non-responders at baseline, month 1 and month 6. OUTLINE: PHASE I (WEEKS 1-4): Patients complete self-paced web-based lifestyle program modules over 45-90 minutes weekly for 4 weeks. Patients adhere to a personalized diet meeting American Institute of Cancer Research (AICR) guidelines and receive access to online resources, including AICR resources, online cooking class videos, healthy eating recipes and tips. Patients participate in moderate-intensity aerobic physical activity over 10-30 minutes on 5 days weekly and resistance training over 30 minutes on 2-3 times weekly. PHASE II (WEEKS 5-26): Patients are assigned to 1 of 2 groups based on Phase I progress. GROUP I (EARLY RESPONDER): Patients continue web-based program modules, exercise program and diet recommendations as in Phase I. Patients also attend virtual group sessions over 45-50 minutes weekly for weeks 5-26. GROUP II (EARLY NON-RESPONDER): Patients continue web-based program modules, exercise program and diet recommendations as in Phase I. Patients also set goals for behavioral changes weekly and receive just-in-time adaptive interventions (JITAI) tailored resource components via mHealth + EMA during weeks 5-26. Patients wear a physical activity tracker daily and receive access to the Fitbit application (App). Patients may also participate in a focus group over 30-45 minutes on study. Additionally, patients undergo urine and blood sample collection throughout the study. After completion of study intervention, patients may follow up in 6 months.