Go on then - what's the difference?
Well my source says fartlek has active recoveries whereas intervals you stop between reps. So there.
It's where you pat a cat vigorously until it farts on you.
I reckon your source has just made up a definition to suit themselves. You wouldn't get a mark in PE Studies for that definition.
So now I'll fail every unit at high school. Thanks a lot.
Actually we didn't do any theory type stuff in PE when I was at high school so I would have lost marks for being a smart arse (or a fart arse with Tash's definition).
To be fair to him though, he didn't actually say you stop for intervals. I made that up. I think my run yesterday did match the definition of fartlek though in that it was totally unstructured. So there.
Are you calling me fat???? How Dare You. I'm not going to pat your kitties from now on... you you... you meanie.