Frailty is a multi-factorial biologic syndrome of decreased reserve, influenced by the combination of one’s physical, psychological and social health. Although a recognizable and common phenomenon in ageing, it is difficult to accurately define and diagnose. Within the TILDA Frailty Working Group, we utilise this nationally representative and longitudinal study of community-living people aged 50 and over to explore the determinants and consequences of frailty. We also endeavour more accurately characterise this age-related syndrome. Waves 1 (2010) and 2 (2012) of the study have been completed. In Wave 3 (2014) we plan to expand our research activities to include resilience and the impact of muscle strength/sarcopenia in frailty.