What is free diving BTV?

Free diving BTV refers to the action of diving as deep as possible by adjusting your abdominal breathing and holding your breath without carrying a gas bottle. Free diving includes free diving activities such as entertainment, experience, photography and hunting, as well as extreme breath-holding deep diving of competitive nature.

Free diving is undoubtedly very dangerous, and drowning is one of the risks. When divers dive, seawater will exert great pressure on their lungs, and some people may even have so-called "shallow water fainting", and lose consciousness when approaching the water surface during floating. This sport requires high physical fitness, but it also requires strict personal attention. You must get rid of all distractions and devote yourself to diving.

When diving, the capillaries of the human body contract, blocking the flow of blood from the heart to the end of the body, leaving more oxygen and blood in the heart and brain. When approaching the water surface, the capillaries begin to expand again, and blood begins to flow from the brain to the limbs.

In this process, lack of oxygen in the brain can easily cause fainting. Shallow water fainting is only a temporary loss of consciousness and will not have a lasting negative impact on the diver's health. If it happens too frequently, it will become a habitual reaction.

When the brain is deprived of oxygen, the body will have a natural reaction of active shock in order to conserve oxygen. It is dangerous to dive alone for the first time-fainting itself is not dangerous, but unconsciously facing underwater will lead to drowning, so it is best to dive with experienced partners. At 30 meters underwater, fainting is a potentially fatal factor.