Which statement best describes the effect of lactate threshold training?

• A. LT training reduces endurance.
• B. LT training has no effect.
• C. LT training improves sustained high-intensity performance.
• D. LT training is only for beginners.

Answer: (C)

Lactate threshold training aims to push and train near the point where lactate begins to accumulate in the blood faster than it can be cleared. Training at or around this threshold makes the body's aerobic system more efficient at using lactate for energy, increases mitochondrial density, and improves lactate clearance and buffering. Over time, this shifts the threshold to a higher intensity, so you can sustain a faster pace or higher power for longer before fatigue hits. That clearer ability to perform at elevated intensities is why the statement about LT training improving sustained high‑intensity performance is the best description. LT training does have a real effect and is used by athletes beyond beginners; the other ideas—that it reduces endurance or has no effect—do not align with how this training method changes physiology and performance.