U.S. Seniors Reduce Outdoor Mobility in Extreme Heat, Stanford Study Finds

Researchers at Stanford Medicine developed a mobile app called Cardinal LifeSpace that records GPS data from older adults across the United States. Analysis of the data shows that when the daily average temperature exceeds 29 °C (84 °F), seniors significantly cut back on trips outside their homes. The reduction in distance traveled reflects lower levels of social interaction, exercise, and community participation, factors linked to overall health and longevity. The findings, published in the journal Innovation in Aging, were highlighted by epidemiologist Michelle Odden and data scientist Annabel Tan, who noted that traditional surveys often miss such real‑time mobility changes.

The study underscores the broader health implications of rising heat waves, suggesting that extreme temperatures may exacerbate isolation and health risks among the elderly population.