Summary: Food, Movement, and the Geography of Health
How the Places We Built Shape the Bodies We Have
Margaret Chen, 76, walks to a farmers market in Portland, cooks most of her own meals, and has controlled blood pressure. Darlene Oakes, also 76, lives in the Mississippi Delta. The nearest grocery is a Dollar General 11 miles away. The nearest supermarket with fresh produce is 28 miles away. She stopped driving two years ago. Her diabetes is worsening. Same age, similar family histories. The difference is place.
The USDA estimates 39.5 million Americans live in low-income, low-food-access areas. The food insecurity rate among individuals in households with someone 65 or older rose to 11 percent in 2024, roughly one in nine. Only about 48 percent of eligible older adults participate in SNAP, compared to 83 percent of eligible younger adults. Inadequate nutrition accelerates sarcopenia, weakens immune function, worsens diabetes, and compounds cardiovascular risk. Nine of the ten states with the highest rates of senior food insecurity are in the South.
A 2025 British Journal of Sports Medicine study estimated that if all Americans over 40 matched the activity level of the top quartile (about 160 minutes of walking daily), average life expectancy would increase by 5.3 years. For the least active, the gain could reach eleven years. But walking requires a place to walk. In most suburbs, walkability is an afterthought. In rural areas, walking to any destination is often impossible. The people who need movement most are living in places least designed to allow it.
Air quality and heat compound the picture. Chronic exposure to particulate matter accelerates cardiovascular disease, respiratory disease, and cognitive decline. Communities near highways and industrial facilities bear disproportionate burdens along the geography of historical redlining. Heat-related deaths among older adults have risen 85 percent since the 1990s. Thermoregulation declines with age, and common medications further impair the body’s response.
No single environmental factor operates alone. The neighborhoods lacking grocery stores often lack sidewalks, have poor air quality, face extreme heat, and house the people who cannot afford broadband or air conditioning. This clustering follows the geography of historical disinvestment. The zip code you were born into shaped the air you breathed, the food you could reach, the streets you could walk. By 70, those exposures have written themselves into your body.
The interventions are proven and underfunded: grocery incentives in underserved areas, sidewalks timed for slower pedestrian speeds, emissions regulation near residential populations, cooling centers on schedules matching actual need. The places that need them most lack the political power to create them without external support. That is a pattern, and breaking it requires investment directed by need rather than influence.