Snorkeling is not just about holding your breath while pinching your nose. It is a way of pushing the human body to its limits, a challenge where a simple error can be fatal. Will Trubridge is one of the masters of this discipline. Follow him through this channel document Discovery science, extract from the program Forces of nature.
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Before each descent, the diver must prepare psychologically, relax. The water temperature, the stress and muscle activity will affect the duration of the'apnea. Its performance depends on the ability to saveoxygen contained in its lungs and its organization, as well as the management of diving risks. He oxygenates his body with long and deep breaths taking care not to enter hyperventilation, which would increase his heart rate. Then comes the entry into the water, then the diving start. A camera followed Will Trubridge that day, and this ehealth, broadcast by Discovery science in the program Forces of nature, makes us live this exceptional dive.
From 25 m deep, the first effects are felt. The diver descends to a speed 1 m / s on average, and sinks effortlessly, almost in free fall. His heartbeat slows by 50%, the blood in the arms and legs goes to vital organs like the heart and brain, but also the lungs, preventing their crushing: it is the pulmonary erection.
After 45 s, the diver reaches 50 m, the slow heart rate, the pressure and deprivation ofoxygen plunge the freediver into a meditative state. From 1 min 30 s, the 100 m mark is reached. Because of the pressure of the water on the rib cage, the lungs grow to the size of a melon to that of an orange.
It's time to go up. It is, psychologically, the hardest part. After 2 min 30 s, the diver is again around 60 m deep. The need to breathe becomes more and more heavy, due to the high rate of carbon dioxide in the blood.
2 min 50 s after its first entry into the water, the freediver climbed to 35 m. He continues to swim to the surface, other divers come to his aid for safety reasons. At 3.15 am, this is the most critical phase. The freediver is only 10 m deep, he risks syncope if the brain stops working to save oxygen. After 4 min of travel, the diver finally emerges and can again take a whiff ofair well deserved.
© Discovery science
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