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  • Assessment of ventilation during swimming using backward extrapolation of the ventilation recovery curve
    Kapus, Jernej ...
    The purpose of the present study was to ascertain if backward extrapolation method calculates the pulmonary ventilation (V[sub]E) appropriate in two different breathing conditions, during swimming: ... with and without reduced breathing frequency. Five trained swimmers swam 400 m front crawl at OBLA velocity taking breath every stroke cycle (normal breathing - NB). Then they repeated 400 m front crawl at NB velocity and with NB stroke frequency taking breath every second stroke cycle (restricted breathing - RB). Measures included parameters of blood acid-base status (pH, P[sub](O[sub]2), P[sub](CO[sub]2, HCO[sub]3- ) and pulmonary ventilation (V[sub]E). Pulmonary ventilation during swimming was obtained by backward extrapolation method (V[sub](Ee) and by theoretical model (V[sub](Et). There was no significant difference between V[sub](Ee) and V[sub](Et) in NB. Bur the paired T-test showed significant (p 0,05) difference between these two parameters in RB. P[sub](CO[sub]2) was also significantly higher after RB than after NB. It may be concludedthat backward extrapolation method could be used to determine the V[sub]E during swimming without reduced breathing frequency. If exertion is caused by hypercapnia and/or acidosis (reduced breathing frequency during swimming) than backward extrapolation method is questionable.
    Vir: Kinesiology : international scientific journal of kinesiology and sport. - ISSN 1331-1441 (Let. 36, št. 1, 2004, str. 69-74)
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2004
    Jezik - angleški
    COBISS.SI-ID - 2124977

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