The Tour de France is one of the world’s most gruelling events. Over 23 torturous days, competitors will cover more than 2,100 lung-bursting miles. They will train for years in the hope of clinching a coveted yellow jersey.
Yet when it comes down to pure endurance, research suggests another group easily outperforms these elite cyclists: pregnant women.
A review of some of the world’s most physically demanding pastimes suggests that even the most impressive human specimens will hit a ceiling that determines how long they can sustain their activity.
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