The Lactate Curve

As your intensity increases, you're always using a mix of aerobic and anaerobic metabolism. You want that point where lactates start to rise to be at higher and higher wattages. And this is what lactate gives us tremendous amount of information that other parameters don't give us. At given same relative exercise intensity, one athlete is maybe fully glycolic already. There's no fat oxidation, whereas the other one is the lactation, it's considerable amounts of fat.