Repeated apneas do not affect the hypercapnic ventilatory response in the short term
2009 (English)In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 105, no 4, p. 569-74Article in journal (Refereed) Published
Abstract [en]
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.
Place, publisher, year, edition, pages
2009. Vol. 105, no 4, p. 569-74
National Category
Microbiology Sport and Fitness Sciences Physiology
Identifiers
URN: urn:nbn:se:miun:diva-8318DOI: 10.1007/s00421-008-0936-yISI: 000262826200008PubMedID: 19018556Scopus ID: 2-s2.0-59449098782OAI: oai:DiVA.org:miun-8318DiVA, id: diva2:134253
2009-01-192009-01-192018-01-13Bibliographically approved