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Ed Eyestone, a two-time Olympic marathoner and men's cross-country coach at Brigham Young University, has a master's degree in exercise physiology. 這組漸進式乳酸門檻跑的關鍵理唸是每若乾英裡逐級遞增的配速。這樣是爲了訓練你在跑步初期保持耐心，而教會你如何在雙腿疲勞的時候跑得更快。