Read the text and choose the correct answer.

Freediving is one of the world’s most dangerous sports. On the way down, freediver’s lungs shrink to the size of a lemon and on the way back they double in size. But to Sara, all this comes naturally. After years of practising yoga and meditation, she can hold her breath for over five minutes, and her lungs are 22% larger than other women her size.

What happens to freediver’s lungs as they swim down?

• They get a lot smaller.
• They get 22% larger.
• They become twice as big.
• They don’t change at all.