Responses of asthmatic and non-asthmatic athletes to prolonged treadmill running

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Deutscher übersetzter Titel:Reaktionen asthmatischer und nicht-asthmatischer Sportler auf Laufbandfbelastungen
Autor:Freeman, W.; Nute, M.G.L.; Brooks, S.; Williams, C.
Erschienen in:British journal of sports medicine
Veröffentlicht:24 (1990), 3, S. 183-190, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource
Sprache:Englisch
ISSN:0306-3674, 1473-0480
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Erfassungsnummer:PU199202048551
Quelle:BISp

Abstract

Metabolic and cardio-respiratory responses of four asthmatic and four non-asthmatic athletes to two hours of treadmill running at 70 percent of maximal oxygen uptake are compared. The asthmatic group had pre-exercise airflow obstruction, as indicated by the lower forced expiratory volume in one second (FEV1) even after medication (2.90 +/- 0.66 l) compared to the non asthmatic group (4.09 +/- 1.33 l). Changes in blood lactate, glucose and catecholamine concentrations as a result of the two hour run were similar for the two groups. However, the pattern of breathing was different. The asthmatics had a slower breathing frequency but a similar tidal volume to the non-asthmatics. Both groups had in increase in the ventilation rate over the two hour run. For the non-asthmatic group, this increase in ventilation was achieved by an increase in the breathing frequency (p<0.01), whereas tidal volume was reduced (p<0.05). The increase in the ventilation rate over the two hour run for the asthmatic group was brought about by a small increase in breathing frequency (p<0.05), whereas tidal volume was not changed. This maintenance of the tidal volume by the asthmatic athletes during endurance running may compensate for the airflow abstruction, and so allow successful participation in endurance running. Verf.-Referat