The NBC News website reports on “dangerous underwater breath-holding behavior [DUBB]” in swimming pools. In the May 22 issue of the CDC’s Morbidity and Mortality Weekly Report, officials with the New York City Department of Health and Mental Hygiene “report on 16 such cases” in which “four people drowned.”
In each of the four deaths, those who drowned were “engaged in intentional hyperventilation” and were swimmers of considerable skill.
HealthDay reports that while “breath-holding contests are a common cause of this type of drowning,” drownings can also occur “as a result of training drills aimed at improving…fitness and lung capacity, according to the report.”
In some cases, “swimmers might intentionally hyperventilate before submerging themselves for extended periods, or try to swim for long distances while holding their breath.”
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