Just being in the water may confer additional breath-holding ability. All mammals have what is known as a diving reflex. The involuntary reflex is most obvious—and pronounced—in aquatic mammals like whales and seals. But humans have this reflex, also. The purpose seems to be to conserve the oxygen that is naturally stored throughout the body, according to one study. When a mammal dives into the water, the heart rate slows, and the capillaries of extremities like arms and legs—or flippers—constrict.
Blood and oxygen is redirected towards the internal organs. The reflex helps diving animals override the need to breathe, which means they can stay underwater longer. Unless a person holding their breath is underwater or in an equally dangerous environment, they are not in any imminent danger. However, according to the Journal of Applied P h y s i o l o g y , some additional risks may include:. If a person is interested in increasing their lung capacity, they can train their bodies and lungs to go without oxygen for increasingly long periods.
Divers may use apnea training to help them increase their lung capacity. Before attempting to increase their lung capacity, a person should seek guidance from their healthcare provider and consider training with professional diving experts and those knowledgeable about lifesaving techniques. A person can typically hold their breath for a few seconds to a little over a minute before the urge to breathe again becomes too strong. Individuals can increase their lung capacity by practicing holding their breath for longer periods.
In addition to the recreational or professional benefits of an increased lung capacity, a person may experience additional health benefits from breath-holding. If practicing in water, an individual should consider their safety. This could include swimming with others and having someone close who can perform lifesaving techniques should they become unconscious. Knowing the steps of CPR can help save a person's life.
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