What is NOT improved during LSDT?

• A. Endurance
• B. VO2 Max
• C. Lactate threshold
• D. Running economy

Answer: (B)

Long Slow Distance Training focuses on building aerobic efficiency by maintaining a steady, comfortable pace for a long duration. The main adaptations from this approach are improvements in running economy, lactate management, and overall endurance, not maximal capacity.

Running economy improves because the body becomes more efficient at delivering and using energy at submaximal speeds, so you can cover the same distance with less energy per unit. Lactate threshold shifts upward as the body becomes better at clearing and buffering lactate during prolonged efforts, allowing you to sustain a faster pace before fatigue from lactate buildup sets in. Endurance widens because the muscles develop greater oxidative capacity, capillarization, and mitochondrial density, extending the time to exhaustion at endurance efforts.

VO2 max, the maximum rate of oxygen consumption, typically requires higher-intensity stimuli to increase. Long slow distance at low to moderate intensity does not push the cardiorespiratory system to its maximum, so VO2 max is not significantly improved by LSDT.