outdoor fitness
30% Higher Smog‑Exposed vs Low‑Traffic Outdoor Fitness 2026
30% Higher Smog-Exposed vs Low-Traffic Outdoor Fitness 2026 Outdoor fitness spots near heavy traffic expose users to 35% more particulate matter, making them less safe than low-traffic parks. Studies in Chicago show that NO₂ spikes along major corridors, and real-time alerts in Grand Rapids cut breathing complaints by 38%. Medical