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The Oxygen Advantage, What Doesn't Kill Us 2 Books Collection Set - Non Fiction - Paperback SaveMoneyLoseWeight and timing ideas that reduceTitles in This Set: The Oxygen Advantage What Doesn't Kill Us Condition: BRAND NEW Format: Paperback ISBN: 9780349406695 9781911617549 Overview: Discover a two book collection that unlocks practical, sciencebacked methods to boost breathing, resilience, and physical performance. The Oxygen Advantage by Patrick McKeown introduces a breathing retraining programme that couples nasal, diaphragmatic breathing with controlled breathholds to mirror altitude