“Unlike a 5k, in which you try to maintain a low tempo pace for a continuous run, in fartlek training there’s going to be short bursts of speed.” For example, you might run for two minutes ...

Fartleks are an informal version of interval training. To start fartlek training, head outside, warm up for a few minutes at whatever activity you most enjoy — whether it’s walking ...

A typical interval workout might be 8 x 400m reps at 5K pace, with recoveries lasting the duration of the rep. Fartlek workouts are a great way to introduce faster or more intense running into ...