Feasibility and Effects of Home-based Physical Activity Intervention in Patients With Breast Cancer in Indonesia

The goal of this clinical trial is to learn the impact and implementation of home-based aerobic and resistance training for patients with breast cancer in Indonesia. The main questions it aims to answer are: * Does the home-based aerobic and resistance training improve physical fitness, fatigue, and quality of life of patients with breast cancer? * Are the benefits of aerobic and resistance training mediated by inflammatory level changes? * What are the barriers and facilitators in implementing the home-based aerobic and resistance training? * Is the home-based aerobic and resistance training feasible to be implemented in Indonesia's setting? To answer those questions, participants will: * Conduct home-based aerobic and resistance training with supervision. * Visit the hospital once every 4 weeks for their routine visits. * Undergo physical fitness test before and after 12 weeks using treadmill test, as well as interviews to assess fatigue, quality of life, and intervention acceptability. * Keep a diary to record the aerobic and resistance training at home. * Undergo routine monitoring by phone every week with the research team.