When exercise intensity exceeds the mitochondria's capacity to clear lactate, blood flow is shunted away from the gut, reducing gluconeogenesis and lactate disposal.

“now if you take that same athlete now and you push him to a lactate that elicits maybe six or 8 Millar they're going to be really a lot of differences there and now you've exceeded their capacity of the mitochondria to clear lactate and also you're probably going to have shunting away from the gut this goes back to something we we mentioned in passing so glucan Genesis to making of glucose from lactate depends on good liver blood flow when you start going really really hard all your blood's going to go to your muscles basically and you're going to clamp down you're not going to profuse the liver so now that glucan Genesis goes down regardless of who you are when you sort of take the liver and the kidneys out of circulation now and of course those are major organs of lactate disposal as well”