The Feasibility of a Co‐Designed Online Healthy Living Intervention for Cancer Survivors: Valuable Content, But Limited Engagement

INTRODUCTION: Healthy Living after Cancer (HLaC) was an evidence-based, telephone-delivered lifestyle program for survivors. HLaC Online was co-designed with cancer survivors, healthcare professionals, and cancer support representatives to enhance sustainability and reach through a self-directed digital format, while incorporating both physical health and mental health content. This study examined HLaC Online's feasibility. METHODS: Eleven Australian post-treatment cancer survivors participated in a 12-week, single-arm pilot with mixed-methods evaluation. Feasibility indicators included uptake, usage, attrition, usability, satisfaction, and indicators of preliminary efficacy. RESULTS: Of 318 website visitors, 11 enrolled, with nearly half never logging in. Module usage was limited (M = 3.3 of 9 modules) and only 5 completed follow-up. Perceived usability of HLaC Online was varied (rated F- B+). Qualitative feedback highlighted the relevance of psychosocial modules, but engagement was hindered by technology barriers, cancer-related symptoms, and lack of guidance. Participants suggested human support for orientation, accountability, and motivation. CONCLUSIONS: While HLaC Online was valued for its co-designed mental health focus, feasibility was limited without guidance. Findings raise questions about which survivors can benefit from self-directed digital programs versus those requiring human support. Future work should explore referral pathways, scalable human support models, and tailoring by need.