What’s a Fartlek and should you do it? Chances are you already do without realising! A Fartlek run is an unstructured run with a series of pushes and pulls. Fast paces and slow paces but no pauses and no walks. It doesn’t matter how fast or slow these pushes are as long as you keep the run going. If you’re a visual person this is a game changer. I for one use landmarks for mine and wait until my heart rate settles, But you can also use songs as your queue. Something like after 2 songs of hard wo