Katie Ledecky reveals why she finally came clean about disease

continued her dominance in the pool at the Paris - taking home four medals, including two golds, adding to her collection of 14 medals.

But this was also the first time that the Washington, native took to the pool after revealing in her book 'Just Add Water: My Swimming Life' about a disease she struggles with regularly.

In that book, Ledecky says she has been dealing with postural orthostatic tachycardia syndrome (POTS) - a disorder where a reduced volume of blood returns to your heart after you stand up from sitting or lying down. That can lead to lightheadedness or fainting.

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