This PhD opportunity is a joint project between The University of Queensland (UQ) and the Indian Institute of Technology Delhi (IITD), focusing on the intersection of computer graphics, physical activity, and cardiometabolic disease. The research aims to develop and evaluate digital twin-based fitness interventions for individuals with cardiovascular disease. Using advanced biomechanical modelling and AI, the project will create personalized digital twins that simulate the impact of physical activity on the body. These digital twins will be integrated into a smartphone application, providing visualizations that predict health outcomes based on adherence to fitness plans. The project will involve collaboration with the All India Institute of Medical Science (AIIMS) for participant recruitment and trial execution. The supervisory team includes Associate Professor Mashhuda Glencross (UQ), Assistant Professor Charu Monga (IITD), and Associate Professor Nicholas Gilson (UQ). Applicants should have strong programming skills, experience in computer graphics and simulation, and ideally user interface design. The position is open to both Australian and international students (with some nationality restrictions). No explicit funding information is provided. Interested candidates should review the project details and apply via the provided link.