The Younger Women’s Wellness after Cancer Program (YWWACP) aims to improve quality of life and reduce treatment-related chronic disease risk factors in women ≤ 50 years previously treated for breast cancer. Pilot testing in Australia indicated potential effectiveness. The aim of this randomised controlled trial is to test the feasibility of the YWWACP in New Zealand, prior to embarking on a national trial of the intervention. The objectives are to investigate two crucial feasibility factors: 1.To determine whether a representative sample of Māori, Pacific and Asian women, and those from non-metropolitan and more deprived areas of New Zealand, can be recruited to the study. 2.To determine whether the proposed questionnaire suite reduces participant measurement burden compared to pilot work, while capturing critical variables. Potential outcomes include confirmation that the proposed large-scale study in New Zealand is feasible, and reduction of treatment-related chronic disease risk in feasibility study participants.