The point at which lactate begins to accumulate in the blood during increasing intensity is known as what?

• A. VO2 max
• B. Ventilatory threshold
• C. lactate threshold
• D. Anaerobic threshold

Answer: (C)

Lactate threshold is the point during increasing exercise intensity where lactate begins to accumulate in the blood because lactate production from anaerobic glycolysis outpaces its clearance. Below this point, lactate is produced and cleared at similar rates, so blood lactate stays near resting levels. As intensity rises and glycolysis speeds up, lactate builds up when the body can’t remove it quickly enough. This threshold marks a practical limit on sustainable effort and helps set training zones. It’s different from VO2 max, which is about maximal oxygen uptake, and though it often coincides with the ventilatory threshold, the question specifically refers to the lactate buildup, making lactate threshold the best term.