A few years ago, when Harper Spain was told she couldn’t join her second-grade running club at her school in Wisconsin because she was too young at the time, her mom, Laurel Mullen, had an idea: ...

Keira D’Amato retired from running in her early 20s, but a decade later she was back and setting marathon records. A new memoir details her journey, which is still unfolding. By Scott Cacciola Visuals ...

Sydney McLaughlin-Levrone became the first woman in nearly 40 years to run the 400 meters in less 48 seconds. She explains how she did it.