Fartlek Training for Trail and Ultramarathon Runners
By Darcie Murphy, CTS Ultrarunning Pro Coach Fartlek runs are fun, challenging, and useful for ultramarathon runners. And, of course, ‘fartlek’ is just a fun word to throw into conversation. A Scandinavian term coined in the 1930s by Swedish coach Gosta Holmer, fartlek translates to ‘speed play’ in English. And ‘playing with speed’ is …