Every winter, as the air thickens with smog and the city wakes under a grey haze, many people take pride in keeping their fitness goals alive — jogging, cycling, or walking outdoors, often with masks on and determination intact. But while these habits seem healthy, the truth is more unsettling: when pollution levels spike, your morning run could be doing more harm than good, particularly to your brain.

Beyond the Lungs: Pollution’s Hidden Impact on the Brain

Air pollution is widely known for damaging the lungs and heart, but new research shows its reach goes far deeper. Scientists have found that prolonged exposure to fine particulate matter — the tiny particles that hang invisibly in polluted air — can affect brain chemistry and even alter its structure over time.

When inhaled, these p

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