SINGAPORE: A man who drowned while practising a breathing method underwater likely suffered a shallow water blackout as a result of holding his breath underwater after he had hyperventilated, a coroner has found.
At about 7.10pm, a resident entered the pool to swim some laps. He noted that Mr Goh appeared to be doing breathing exercises in the pool and was not swimming laps. When he reached the locked gate to the pool area and looked over, the neighbour saw Mr Goh lying at the bottom of the pool. He immediately alerted the security guard at the main entrance to Mimosa Park.
Participants would take up to 30 breaths before holding their breath for a period of time. This was described as a form of meditation, where participants will gradually feel the urge to breathe build up. The consequence of holding one's breath longer without the corresponding urge to breathe - that would usually be present if carbon dioxide has not been expelled through hyperventilating - was that the practitioner may faint due to lack of oxygen.
He also emphasised that the breathwork component should not be carried out concurrently during the cold immersion portion of the Wim Hof method. The most dangerous risk for shallow water blackout comes from repetitive, competitive prolonged breath-holding laps with little rest in between, especially if intentional or unintentional hyperventilation has occurred.
Darwin continues to be right.
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