The PREBEAT Trial: Digital PREhaBilitation in thE Cardiac Surgical populATion

The goal of this randomised controlled trial is to learn if a digital prehabilitation program is feasible in patients awaiting cardiac surgery. The main questions it aims to answer are: 1. Is the digital health program usable? 2. Is the digital health program acceptable? 3. Do patients adhere to the digital health program? Researchers will compare a group using the digital prehabilitation program with standard care to see if the program is feasible and explore any differences in health outcomes. Participants will * Use a digital health mobile phone application to guide you through exercise, nutrition and preparation for surgery. * Engage in telehealth consultations. * Complete questionnaires * Complete exercise testing

Inclusion Criteria: * 21 days+ prior to cardiac surgery * Able to provide consent, * Proficient in English to understand questionnaires, training instructions and outcome assessments. * Digitally literate to independently navigate a smart device and novel application. Exclusion Criteria: * severe or unstable neurological, cardiorespiratory, or musculoskeletal disease or mental illness that might compromise ability to perform exercise, * unstable psychiatric or cognitive disorders,