Lactate Threshold and Anaerobic Threshold (also known as the
Onset of Blood Lactate Accumulation OBLA) are very similar and for
most intents and purposes are referred to as the same thing.
Lactate Threshold is the point at which lactic acid produce in the
muscle during glycolysis is not metabolised as fast as it is being
produced. Anaerobic Threshold is the result of this Lactate
Threshold, after Lactate Threshold occurs the extra lactic acid
from the muscle then acuminates into the blood, once Blood Lactate
(BL) level reaches 4 mmol/L it is defined as Anaerobic Threshold or
OBLA. Additionally, this Lactic acid is then Broken into lactate
and acid (H+ ions). The lactate is recycled and used as an energy
source, while the H+ ions are neutralised in the blood, with a
by-product being CO2, the CO2 then needs to be expelled through
ventilation, this is called Ventilatory Threshold (VT) and is
characterised by a sudden heavy ventilation. Put simply Lactate
Threshold, Anaerobic Threshold and Ventilatory Threshold happen in
a cascade chain and each threshold usually occurs soon after the
one before it. (non-plagarised reference: s4121335 UQ)