Exercise benefits cognitive function in older adults by improving blood circulation, which promotes brain health. Regular physical activity enhances neurogenesis and synaptic plasticity, leading to better memory and learning abilities. Exercise is also associated with lower risks of cognitive decline and diseases like Alzheimer's. Moreover, it boosts mood by increasing endorphins and can reduce symptoms of depression and anxiety. Thus, maintaining an active lifestyle is crucial for preserving cognitive function and mental sharpness in aging populations.