
To extend the duration of breath-holding underwater, divers often inhale pure oxygen prior to their dives. This practice can significantly enhance their ability to remain submerged without the need to breathe, allowing some experienced divers to hold their breath for more than 20 minutes at a time. However, it's important to note that in individuals who are not accustomed to diving or who lack training, this reflexive response can be triggered much more quickly. This is largely due to the natural and instinctive urge to breathe, which can overpower the body's adaptations to underwater conditions. Thus, while trained divers can leverage physiological changes to their advantage, untrained individuals may find their ability to hold their breath limited by their innate drive to take a breath.
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