Aerobic exercise, particularly running or high-intensity interval training (HIIT), is especially beneficial for mental clarity. These forms of exercise increase blood flow to the brain, stimulating the release of neurotransmitters like endorphins and promoting neurogenesis. Enhanced oxygen supply during exercise improves cognitive functions, including memory and focus, and helps reduce feelings of anxiety and depression. Engaging in regular aerobic activities can improve attention span and overall mental performance, making them a key component for maintaining mental sharpness over time.