interval work

The Fartlek: What On Earth Is That?

The Fartlek: What On Earth Is That?

If I’m being honest, Fartlek is one of my least favorite words.  However, it’s one of my favorite type of run workouts.  The term “fartlek” is a Swedish word that means “speed play”.  In a nutshell, a Fartlek blends continuous running with interval work.  So what differentiates it from interval work?