The aging Veteran population will substantially increase over the next 10 years, as the 24.9% of Veterans who are currently between 55-64 years of age join the 38.5% who are already over age 65. The risk of stroke more than doubles each decade after age 55, which places Veterans at an ever-increasing risk of suffering stroke-related language impairment (i.e., aphasia). Difficulty retrieving words, which negatively impacts psychosocial well-being and quality of life, is the most common complaint in healthy aging and aphasia. Word retrieval interventions to maintain or restore communicative function are needed. Studies have shown that physical exercise can improve word learning in young adults. This study will investigate the effects of exercise on word learning in aging and aphasia. The results will help the us understand how exercise may be used to optimize word retrieval interventions for our aging Veterans.