The Cardiorespiratory fitness of children and adolescents in Tibet at altitudes over 3,500 meters.

PLoS One · 2021 · PMC8375997 · PMID 34411164

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a decreasing trendno p-value reported

Thus, VO2peak as a unit per kilogram of bodyweight presents a decreasing trend [ 46 ].

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.