I know this because I’ve backed up that little note, along with years of training logs since then, in a Google Doc on my computer. To anybody who isn’t a runner, it might sound weird, even excessive, ...

For the last 15 years—starting in 2003, my first season of high school cross-country—I’ve kept a physical training log. The earliest versions just contain mileage totals and basic workout details, ...

In this age of online everything, many runners track their training digitally by syncing their watches to the cloud. But thanks in part to Instagram and Pinterest, an analog alternative is trending.