2021
DOI: 10.1152/ajpregu.00202.2020
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Carotid body chemosensitivity is not attenuated during cold water diving

Abstract: Introduction: Tonic carotid body (CB) activity is reduced during exposure to cold and hyperoxia. We tested the hypotheses that cold water diving lowers CB chemosensitivity and augments CO2 retention more than thermoneutral diving. Methods: Thirteen subjects (age: 26±4 y; BMI: 26±2 kg/m2) completed two, four-hour head out water immersion protocols in a hyperbaric chamber (1.6 ATA) in cold (15°C) and thermoneutral (25°C) water. CB chemosensitivity was assessed using brief hypercapnic ventilatory response (CBCO2)… Show more

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