I think that is nonsense because everyone has a Lactate Threshold. His may just be at a faster pace then most ultra runners. Regarding your last comment: Anyth

I think that is nonsense because everyone has a Lactate Threshold. His may just be at a faster pace then most ultra runners. Regarding your last comment: Anything under approximately 10 mile race pace is under your lactate threshold pace (LT). http://en.wikipedia.org/wiki/Lactate_threshold http://en.wikipedia.org/wiki/Lactate_threshold LT pace means you are in a steady state. The lactate your are creating is being eliminated at the same rate. The further beneath that pace you go the shorter you will be able to maintain it. I would describe going well under LT pace as a feeling of "heaviness" in your legs as lactic acid builds up in your blood stream. From: http://en.wikipedia.org/wiki/Sprint_(running) http://en.wikipedia.org/wiki/Sprint_(running) Human physiology dictates that a runner's near-top speed cannot be maintained for more than 30–35 seconds due to the accumulation of lactic acid in muscles.[4]