营销话术证据 A · 指南级
乳酸是力竭和酸痛的元凶
真相
乳酸本身是燃料，不是废物；酸来自 H+ 累积，与乳酸生成同时发生但非因果。
机制速览
1980 年代之前的旧模型把乳酸等同于缺氧 + 疲劳 + 废物. 这个模型在 40 年前就被推翻, 但仍在体育课和健身房流传.
来源（4）
- Brooks, G. A. (2018). The science and translation of lactate shuttle theory. Cell Metabolism, 27(4), 757-785. Definitive modern review establishing lactate as fuel rather than waste; the 'lactic acid burn' framing is anatomically and biochemically incorrect.
- Hawley, J. A., Lundby, C., Cotter, J. D., & Burke, L. M. (2018). Maximizing cellular adaptation to endurance exercise in skeletal muscle. Cell Metabolism, 27(5), 962-976. The physiological basis for low-to-moderate intensity (Zone 2) work as the dominant driver of mitochondrial biogenesis and fat-oxidation capacity.
- Robergs, R. A., Ghiasvand, F., & Parker, D. (2004). Biochemistry of exercise-induced metabolic acidosis. American Journal of Physiology — Regulatory, Integrative and Comparative Physiology, 287(3), R502-R516. The acidosis of intense exercise is from ATP hydrolysis–derived H⁺, not lactate. Lactate is in fact a proton buffer.
- Joyner, M. J., & Coyle, E. F. (2008). Endurance exercise performance: the physiology of champions. The Journal of Physiology, 586(1), 35-44. Synthesises VO2max + lactate threshold + running economy as the three pillars of endurance performance — elite marathoners race at ~85-90% VO2max because their LT2 has shifted up.