What is the significance of improved buffering capacity for high-intensity efforts?

• A. Better buffering reduces acidosis, delaying fatigue.
• B. Increases reliance on oxygen transport.
• C. Reduces lactate production.
• D. Boosts adrenaline levels.

Answer: (B)

Buffering capacity helps neutralize the hydrogen ions that flood the muscle during high‑intensity effort. As you work hard, glycolysis speeds up and lactate production increases, releasing H+. If these ions accumulate, the muscle environment becomes acidic, enzymes slow down, calcium handling is impaired, and fatigue hits sooner. When buffering systems — like bicarbonate and other buffers — can mop up H+, the pH stays closer to normal, so energy‑producing reactions and muscle contraction stay more efficient for longer. This is why improved buffering is significant: it delays fatigue by maintaining a more favorable pH during intense activity. It doesn’t directly increase oxygen transport, reduce lactate production, or boost adrenaline levels, which is why the other options aren’t the primary effect of buffering capacity.