# 跑步表現受限總是會跟身體中最弱的部位有關。舉例來說,假如跑者的腿部可以在4分鐘以內跑1英里(約1.6公里),但肺臟缺乏提供腿部足夠氧氣的能力的話,那麼腿部的表現就也會受限於肺臟的允許範圍——《跑步解剖書 第2版》
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