LSDT's primary metabolic target is

• A. Increases VO2 Max
• B. Depletes glycogen stores
• C. Increases lean mass
• D. Improves sprint speed

Answer: (B)

Long, slow distance training primarily targets how the body uses its fuel during extended efforts. The goal is to stress the body's glycogen system over a long period, promoting adaptations in glycogen metabolism and endurance. By driving sustained activity, this kind of training challenges glycogen stores and trains the muscles to rely on carbohydrate pathways efficiently over long durations, which can improve the capacity to store, mobilize, and utilize glycogen during endurance work.

While increased VO2 max, greater lean mass, and faster sprint speed are valuable adaptations, they come more directly from higher-intensity, resistance-focused, or sprint-focused training. Long, slow distance work is built around maintaining a steady, low-to-moderate pace for a long time, making glycogen depletion a central metabolic stress to elicit endurance adaptations.