A few months ago, I walked to the Frick Museum in New York City with a faster-than-me runner friend. On our way, she said, “Slow down. I’m trying to keep up with you!” I was embarrassed, but also ...

Most people want a simple answer to “What’s a good time?” The honest one: it depends on the distance, your age, and whether we’re talking sprint speed or endurance pace. Below are practical, ...