RecruitingBehavioural interventionBalance After Traumatic Brain InjuryA moderate traumatic brain injury (TBI) occurring in early or middle adulthood might have long-lasting effects on the brain that can accelerate the decline of physical and cognitive function in older age. The proposed study seeks to better understand the implications of aging with a TBI, in order to help Veterans maintain their health and independence. The overarching hypothesis of this new line of research is that participants who experienced a moderate TBI in early or middle adulthood (at least 15 years prior to study enrollment) will have poorer performance on balance and cognitive tests, despite self-reporting no persistent motor or cognitive impairment from the TBI. The investigators also seek to evaluate the potential for practice-based learning and improvement of complex balance tasks in this population, to gain experience for conducting future rehabilitation studies. The long term goal of this line of research is to design rehabilitative and lifestyle interventions to preserve brain health and function in Veterans who have previously experienced a TBI.