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Repeated apneas do not affect the hypercapnic ventilatory response in the short term.

In English

Författare

Summary, in English

Long-term training of breath-hold diving reduces the hypercapnic ventilatory response (HCVR), an index of the CO(2) sensitivity. The aim of the present study was to elucidate whether also short-term apnea training (repeating apneas with short intervals) reduces the HCVR, thereby being one contributing factor explaining the progressively increasing breath-holding time (BHT) with repetition of apneas. Fourteen healthy volunteers performed a series of five maximal-duration apneas with face immersion and two measurements of the HCVR, using the Read rebreathing method. The BHT increased by 43% during the series of apneas (P < 0.001). However, the slope of the HCVR test was not affected by the series of apneas, being 2.52 (SD 1.27) and 2.24 (SD 1.14) l min(-1) mmHg(-1) in the control test and in the test performed within 2 min after the last apnea of the series, respectively (NS). Thus, a change in the HCVR cannot explain the observed short-term training effect on BHT.

Publiceringsår

2009

Språk

Engelska

Sidor

569-574

Publikation/Tidskrift/Serie

European Journal of Applied Physiology

Volym

105

Issue

4

Dokumenttyp

Artikel i tidskrift

Förlag

Springer

Ämne

  • Physiology

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1439-6327