When the first running boom hit the United States in the 1970s and 1980s, it was all about racing. A runner’s daily running was called “training,” and geared toward running fast at the weekly 10k race ...

Despite warm weather and sunshine during the day, it was dark and cold when I finally got out for a run one evening last week. Bundling up against a chill wind, I was beginning to think, as some of ...