Today, on Jan. 29, 2016, I taped a brief Periscope on how to do unstructured, spontaneous winter fartlek. Fartlek is Swedish for “speed play”. A while back, I began using #FartlekFriday on Twitter to mark my Friday runs and remind others to remember to run fartlek workouts. Enjoy! Happy Fartlek Friday and have a great weekend!
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