Free divers literally take a deep breath, then descend into the depths without a breathing apparatus.

It's dangerous.

Free divers can get lung damage.

They can black out or die from doing this.

But for those willing to take the risks, their love for the sport goes well below the surface.

I'd be lying if us here.

I've never been scared.

I've had two occasions where I sort of thought you're not going to make it.

But as long as you keep your composure, everything seems to work out.

My name is Jonathan Cenex.

I'm 30 years old from New Zealand.

We're on Long Island in the Palmers at the beautiful dean's blue hole.

I'm a professional freedom.

Competitive free diving is where we compete to see you, consume the further wrist, deepest or hold their breath for the longest.

We've achieved things that doctors once thought were impossible way We're exploring the capabilities of the human body, pushing ourselves to see what the human body can really do.

I feel like I'm just getting started.

We could have designed anything better thistles like free diving mecca.

People come from all over the world it is, Think place to die.

One of the things that lured me into the sport was the whole science behind it.

Before I dive will go through a whole preparation, and that will include stretching of the body stretching of the lungs, diaphragm, intercostal muscles.

Packing is adding extra year to your already full lungs by using the mouth is a pump.

I would estimate that I will pack at least an extra leader into my life, and then I'll come down to the beach.

I'll visualize my dive whilst I'm making my deepest dives.

What goes through my mind is always positive thoughts, positive energy.

It's like a form of meditation, very deep within yourself.

Physical sensation.

I get through diving.

It touches on all senses.

What you can see, what you can hear.

Or maybe even it is the lack of.

During dives, our heart rates dropped down to below 30 beats per minute.

When we're going down to depths where we've got basically the length of a football field above us, it's not the sort of place where you want to have any sort of negative thoughts when I make it to the surface.

After big dive.

It's almost spiritual experience.

It is quite a famous quote.

A scuba diver will go underwater to look around, and free Diver will go underwater to look inside himself.