Acute Effects of Using Added Respiratory Dead Space Volume in a Cycling Sprint Interval Exercise Protocol: A Cross-Over Study

Natalia Danek, Kamil Michalik, Marcin Smolarek and Marek Zatoń
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Natalia Danek: Department of Physiology and Biochemistry, Faculty of Physical Education and Sport, University School of Physical Education in Wroclaw, 51-612 Wroclaw, Poland
Kamil Michalik: Department of Human Motor Skills, Faculty of Physical Education and Sport, University School of Physical Education in Wroclaw, 51-612 Wroclaw, Poland
Marcin Smolarek: Department of Physiology and Biochemistry, Faculty of Physical Education and Sport, University School of Physical Education in Wroclaw, 51-612 Wroclaw, Poland
Marek Zatoń: Department of Physiology and Biochemistry, Faculty of Physical Education and Sport, University School of Physical Education in Wroclaw, 51-612 Wroclaw, Poland

IJERPH, 2020, vol. 17, issue 24, 1-12

Abstract: Background: The aim of the study was to compare acute physiological, biochemical, and perceptual responses during sprint interval exercise (SIE) with breathing through a device increasing added respiratory dead space volume (ARDS V ) and without the device. Methods: The study involved 11 healthy, physically active men (mean maximal oxygen uptake: 52.6 ± 8.2 mL?kg 1 ?min −1 ). During four visits to a laboratory with a minimum interval of 72 h, they participated in (1) an incremental test on a cycle ergometer; (2) a familiarization session; (3) and (4) cross-over SIE sessions. SIE consisted of 6 × 10-s all-out bouts with 4-min active recovery. During one of the sessions the participants breathed through a 1200-mL ARDSv (SIE ARDS ). Results: The work performed was significantly higher by 4.4% during SIE ARDS , with no differences in the fatigue index. The mean respiratory ventilation was significantly higher by 13.2%, and the mean oxygen uptake was higher by 31.3% during SIE ARDS . Respiratory muscle strength did not change after the two SIE sessions. In SIE ARDS , the mean pH turned out significantly lower (7.26 vs. 7.29), and the mean HCO 3 – concentration was higher by 7.6%. Average La − and rating of perceived exertion (RPE) did not differ between the sessions. Conclusions: Using ARDS V during SIE provokes respiratory acidosis, causes stronger acute physiological responses, and does not increase RPE.

Keywords: sprint interval exercise; cardiorespiratory responses; blood lactate; added respiratory dead space; respiratory acidosis (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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