The proportion of older acute care physicians (ACPs) has been increasing. Ageing is associated with physiological changes and research investigating how such age-related physiological changes affect clinical performance is lacking. Specifically, Crisis Resource Management (CRM) consists of essential clinical skills in acute care specialties which when absent, can significantly impact patient safety. As such, the goals of this study are to investigate whether ageing has a correlation with baseline CRM skills of ACPs and whether ageing influences learning from high fidelity simulation.