fartlek today. 5,4,3 on followed by 2 min off and a 3 minute set break. did two sets. It was scorching hot and humid out, just about sweated out all the water in me. Definitely shouldnt have slept in today. Anyways, the 4 miles of threshold is an estimate as during a fartlek I am not sure how much ground I covered during the on and off portions.
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