I saw in these lists the structural racism that underlies running—the gap between overwhelmingly white, wealthy communities where people can easily run, and the under-resourced communities of color where running is less safe and less practical. If you have a good place to run, more people will be running, and the data confirm this. I compared maps of previously redlined areas in Harlem and Brooklyn with activity levels for those areas from Strava heat-map data—maps that register activity levels as “heat” from millions of users around the world. The previously redlined areas of Harlem and
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