Lactate, or lactic acid is produced during extremely intense physical activity, or during anaerobic metabolism. Lactic acid begins to accumulate in the blood when the activity continues beyond the AT, because it cannot be buffered or removed from the blood quickly enough. Within a few minutes of working beyond the AT, a condition called metabolic acidosis occurs and the muscles will stop working at that level. If a police cyclist were to sprint to a scene well beyond his AT, chances are pretty good that he will fall when he exits the bike because of this build-up of lactic acid in his leg muscles, along with the depletion of the immediate stores of energy in his legs. This should assure them that the lactic acid will not be excessive, and that there will be enough fuel left for their legs to properly carry them when they dismount the bike.
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