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. 2023 Apr 15;123(8):1809–1824. doi: 10.1007/s00421-023-05202-7

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© The Author(s) 2023

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Fig. 10 — Heart rate average for baseline (a), HR_peak (b), and during apnea (c). ***p < 0.001 between normal (NB) and hyperventilation (HV) conditions; ^†††p < 0.001, ^††p < 0.01, and ^†p < 0.05 compared with A1 in the same condition