Why is there a deep diver without oxygen tanks?

Half a century ago, science thought that humans could not dive as deep as 115 feet (about 35 meters) at a time, but today this ability has been far removed. Some people have dived for up to 8 minutes at a depth of about 105 meters without oxygen tanks.

According to studies, the reason that these people have special abilities is due to practice, and more importantly, they are endowed with different abilities, healthy bodies, large lungs and Special red blood cell count.

1. Has a large pleura

Men born with large lungs, called lungs XXL, this is the main part that helps the body to dive deep and long under water. They often use air packing technology, which means accumulating the most contingent air, increasing the gas storage capacity twice or higher than ordinary people. In addition, thanks to practice, especially deep breathing techniques, they maintain long dive periods without feeling pain in the water pressure environment, limiting the situation where the lungs are forced into the ribs, causing pain.

2. Special atrial tap system

In deep-water environments, the pressure exerts a strong impact on the eardrum and to prevent membrane tearing, most moderate-depth divers must cover the nose, forcing air to escape through the atrium to balance pressure. force. In free divers with deep diving ability, a special atrial tap system, it can be flexibly opened and closed by the action of the tongue.

3. The ability to regulate blood in the body

Speaking in technical terms, this is a phenomenon of Shunting Reflex (meaning flexible blood circulation return). Usually when diving, blood vessels are shrinking to preserve blood, but in people with deep diving ability, the ability to regulate blood in the body is very good. This technique, through practice, including both terrestrial and underwater exercises, aims to reduce the heart rate to a minimum of 8 beats per minute for longer diving.

4. Practice to be able to produce more oxygen

By sleeping in special tents simulated as high-altitude environments, diver's bodies produce more oxygen-rich red blood cells and are the criterion for the body to tolerate stressful environments. , diving for longer and deeper.