Help Slate build a better running calculator by filling out a short survey. In the article below, Christie Aschwanden explains why existing calculators are flawed, and how you can help create a better ...

I'd been doing most of my long runs at about a 10:30 pace. On my long run this weekend, however, I pushed myself a little and ran at 9:45 pace. I was still able to speak in complete sentences and wasn ...

Preparing for a fall marathon, a runner posts an 18-minute 5K PR in a tuneup race. Excited, he punches the time into three different race-equivalency calculators to find his projected time for the ...