Fartlek is the damn funniest clean word that I have ever heard of.
And one hell of a work out!
2 mile warmup! @9:10 minute pace.
5 minutes at 8:00 pace, 2.5 slow
4 minutes at 8, 2 slow
3 minutes at 7:20, 1.5 slow
2 minutes at 7:20, ok you get the idea
1 minute @ 6:50 (just about killed me)
ran back to the club!
Total 6.2 miles, total run for week so far - 17.2
I love speed work (well, it's speed to me anyway)
I might run a 10 mile on Saturday even if the weather is crappy.