The exercise bronchoprovocation test: Two different procedures in treadmill running challenge

E. Spada, C. F. Donner, A. Meriggi, C. Vecchio

Research output: Contribution to journalArticlepeer-review

Abstract

In order to try and improve the sensitivity of exercise testing to detect exercise-induced asthma (EIA), we submitted fifteen asthmatics with documented EIA to two treadmill challenges that differed only in the time taken for heart rate to reach the target heart rate. The latter was set at 80% of predicted maximum heart rate and was reached either progressively (in 4 min) or rapidly (in 1 min) by appropriate adjustment of the speed of the treadmill. Inspired air temperature and humidity were measured in order to verify that they did not vary significantly. Temperature was 21.8 ± 0.84 (mean ± SD) and 21.8 ± 0.68°C, and humidity was 49.1 ± 3.3 and 49.5 ± 3.2% for the slow test and the fast test, respectively. Both tests caused significant reductions in maximum expiratory flows and specific airway conductance over the 30 min that followed the exercise, with significantly greater responses after the fast test than after the slow one. We conclude that treadmill running is more asthmogenic when the onset of exercise is abrupt than when it is progressive.

Original languageEnglish
Pages (from-to)233-237
Number of pages5
JournalClinical Respiratory Physiology
Volume18
Issue numberSuppl. 4
Publication statusPublished - 1982

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine

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