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Imagine scuba diving without breathing apparatus, diving down hundreds of feet on a single breath and holding it for as long as three and a half minutes.

Discover the world of freediving, an extreme sport that鈥檚 growing in popularity and interest but also one of the most dangerous.

Italy鈥檚 Alessia Zecchini is the world record holder and was recently subject of a documentary, 鈥淭he Deepest Breath鈥�, and tells Sportshour鈥檚 Stefano Montali what drivers her to pursue such a dangerous and deadly pursuit.

Image: Alessia Zecchini starting the descent of a freedive in the ocean. (Photo by Kurt Wang)