Comparison of maximal and submaximal exercise protocols in the provocation of exercise-induced asthma in drug-controlled asthmatics

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Deutscher übersetzter Titel:Vergleich maximaler und submaximaler Belastungsprotokolle als Provokationstest fuer belastungsinduziertes Asthma bei medikamentoes eingestellten Asthmatikern
Autor:Inbar, Omri; Rotstein, Arie; Neuman, Itai; Dlin, Ron
Erschienen in:Clinical journal of sport medicine
Veröffentlicht:2 (1992), 2, S. 98-104, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource
Sprache:Englisch
ISSN:1050-642X, 1536-3724
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Erfassungsnummer:PU199502059691
Quelle:BISp

Abstract des Autors

Aim of the study is to assess airway responsiveness to a progressive and exhaustive running exercise as compared to the "classical" submaximal challenge. 14 asthmatic children (15.5+-1.6 y) performed 2 types of treadmill exercises, prior to and following pulmonary function evaluation. One protocol was an incremental-maximal effort designed to exhaust the subjects within 6 to 8 min (INM). The second protocol was a submaximal steady-state type effort of identical duration, overall metabolic load, and pulmonary ventilation (SM). The mechanical power load during the SM protocol was individually adjusted to elicit an overall (and average) minute ventilation, O2 uptake, and heart rate equal to that recorded during the INM. Both protocols resulted in similar and significant bronchospasm. Our results indicate that a progressive and maximal exercise challenge provokes the same postexertional bronchospasm as that induced by the conventional submaximal effort of equal total metabolic load, minute ventilation, and amount of respiratory heat and water loss. These findings also point to the overriding influence of the 'bulk' (total) over the 'rate' of the physiologic responses, on the induction and severity of exercise-induced asthma. Verf.-Referat