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Oxygen, a Memoir William Trubridge HARPERCOLLINS

Holding your breath and plunging to a depth of 100 metres or more towards the ocean floor seems unimaginably beyond human limitations. But for New Zealander William Trubridge, training his body to cope with suffocation, narcosis, hallucinations, lactic acidosis

and lung compression has been a lifelong pursuit. For Trubridge, who has won the international freediving title 16 times – a circuit that sees 40–60 competitors lose their lives each year – winning involves maintaining a clear head, mental toughness and confidence in how far he can push his body.

William Trubridge held his breath for four minutes and 24 seconds to freedive to 122 metres Books