Environmental factors—specifically heat exposure and neighborhood walkability—significantly influence both physical activity levels and fall risk in low-income older adults. Poor built environments create a dual burden: they reduce activity and simultaneously increase fall vulnerability, suggesting that addressing community infrastructure is as relevant to injury prevention as direct fall-risk interventions.
Key Points
- Extreme heat reduces physical activity in low-income older populations
- Poor walkability independently increases fall risk beyond activity levels
- Environmental barriers create compounded injury vulnerability in aging adults
Longevity Analysis
Fall risk in older adults is typically framed as a problem of individual balance or strength, but this research demonstrates that the built environment functions as a biological stressor affecting multiple physiological systems simultaneously. Heat stress impairs thermoregulation and energy production while simultaneously reducing the protective effects of weight-bearing activity. Poor walkability forces compensatory movement patterns that compromise structural stability and increase proprioceptive load. For low-income populations, these environmental constraints eliminate the protective dose of physical activity that would otherwise buffer against age-related decline. Longevity optimization in this population requires attention to the external conditions that permit or prevent consistent movement practice—infrastructure precedes intervention.
Original published by SAGE Research on Aging, by Yingru Li, Evansha Andre, Adeline Agnew, Dahee Kim, Rui Xie, Dapeng Li, Boon Peng Ng, Ladda Thiamwong1Department of Sociology, 6243University of Central Florida, Orlando, FL, USA2College of Nursing, 6243University of Central Florida, Orlando, FL, USA3Department of Statistics and Data Science, 6243University of Central Florida, Orlando, FL, USA4Disability, Aging and Technology Cluster, 6243University of Central Florida, Orlando, FL, USA5Department of Geography and the Environment, University of Alabama, Tuscaloosa, USA6College of Medicine, 6243University of Central Florida, Orlando, FL, USA.