Incorporate these 12 scientifically proven tips into your schedule for 2021 and it’ll be an amazing year, says Professor John ...

A slow run, defined as anything below 80% of your maximum heart rate, is a strategic way to get your reps in without sabotaging your recovery and setting yourself up for unnecessarily painful ...

News editor Theo Kahler is by far the fastest in the Runner’s World office … seriously. Kahler just finished within the top ...

The breaking point felt imminent as each morning run that summer felt like clock work. I’d head to a nearby trail, log my six-plus miles, return home dripping in sweat, and hate every second of it. I ...