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 ...

Even on training plans built for those with the loftiest of speed goals, you’ll notice that easy runs make up the bulk of the workouts. No matter the distance, clocking your fastest time requires a ...

To test aerobic fitness, Matlock suggests running a one-mile time trial, which means doing a mile at an all-out effort.