Forums >Racing>What does running @ 2-3% below "LT" feel like?
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for LT it feels like: -5a Threshold Z5a is your LTHR, and is usually marked by a sudden increase in breathing. Training at or just under this level is extremely useful. Improved lactate tolerance and economy. "Tempo" pace. For the run, this is about 10 secs per mile slower than 10k pace. Starting to breathe harder (Z4) to breathing hard (5a) stolen from : http://www.cruciblefitness.com/etips/training-zones.htm hope that helps