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The lactate threshold (LT) (or lactate inflection point (LIP) or anaerobic threshold (AT)) is the exercise intensity at which lactate (more specifically, lactic acid) starts to accumulate in the blood stream.
As eluded above, ventilatory threshold is the intensity of exercise that exhibits a larger ventilation than required to merely do the work. At this point, the contribution of anerobic metabolism becomes significant to produce larger concentrations of lactic acid.s eluded above, ventilatory threshold is the intensity of exercise that exhibits a larger ventilation than required to merely do the work. At this point, the contribution of anerobic metabolism becomes significant to produce larger concentrations of lactic acid.