Brady Holmer @Brady_H · 02 Sep 2026
Wow. Air pollution slows marathon finish times... by a lot! For every 5-microgram-per-cubic-meter increase in nitrogen dioxide (a traffic-related air pollutant), men's and women's finish times slowed by ~8 minutes. The biggest effects were among mid-pack, recreational, and https://t.co/wg8Y538X9S
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