The Oxygen Advantage: The simple, scientifically proven breathing technique that will revolutionise your health and fitness

by Patrick McKeown

I soon discovered a study conducted by the University of Exeter that investigated the effects of increased dietary intake of beetroot juice, which is rich in the nitrates required to generate nitric oxide. A study group of men aged between nineteen and thirty-eight drank about 480ml of beetroot juice every day for a week. This resulted in a ‘remarkable reduction’ in the amount of oxygen required to perform exercise in comparison with a control group who drank water: the juice drinkers were able to cycle up to 16 per cent longer before tiring. Furthermore, blood pressure within the beetroot juice drinkers dropped (within normal levels), even though it wasn’t high to begin with.