Physical activity significantly impacts the aging brain by promoting neuroplasticity, increasing cognitive function, and reducing the risk of neurodegenerative diseases. Regular exercise encourages the release of growth factors like BDNF (brain-derived neurotrophic factor), enhancing brain health and potentially delaying cognitive decline. It also improves mood and reduces the risk of depression, which can adversely affect brain function. In summary, consistent physical activity serves as a vital tool for maintaining brain health in older adults.