If you have seen a different "best cities" list with Arlington, Virginia on top and wondered why it does not match this one, you are noticing something real. There is a second, well-regarded benchmark: the American Fitness Index, published by the American College of Sports Medicine. It ranks the 100 largest U.S. cities on 35 indicators, with a sharp focus on personal fitness behaviors and the built environment that supports them, such as parks, recreation facilities, and bike lanes.
In the most recent 2025 edition, Arlington, Virginia took the top spot — its eighth year in a row in first place — followed by Washington, D.C., Seattle, San Francisco, and Denver. The rest of the top ten included Minneapolis, Madison, Atlanta, Sacramento, and San Diego. The report also captured a hopeful trend: the average share of residents meeting aerobic activity guidelines rose to 59.9%, up from 50.9% in an earlier period, even as a few indicators like air quality and food insecurity moved in the wrong direction.
So why do the two lists disagree at the top? Because they measure different things. The healthiest-cities ranking weighs health-care cost and access and the food environment heavily, while the fitness index centers on physical activity and the infrastructure that enables it. That is why Arlington can lead on fitness without topping the broader health list, and why San Francisco can lead overall while sitting fourth for fitness. What is striking is the overlap: Seattle, San Francisco, San Diego, Denver, and Washington, D.C. appear near the top of both. When two different methods keep pointing at the same places, it is a reasonable signal those cities genuinely support healthy, active lives. Building more movement into your own week does not require their zip codes, though — these small daily changes that support healthy aging travel well anywhere.