PEDIATRICS Vol. 56 No. 5s November 1975, pp. 893-898
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The Use of the Treadmill for Assessing Exercise-Induiced Asthma and the Effect of Varying the Severity and Duration of Exercise

Simon Godfrey M.D., Ph.D., M.R.C.P.1, Michael Silverman M.D.1, and Sandra D. Anderson Ph.D.1

1 Department of Paediatrics and Neonatal Medicine, Hammersmith Hospital. London, England

Running produces a greater amount of post-exercise bronchoconstriction than other forms of exercise Carried out at similar metabolic rates. The treadmill can be used to provide a standardized form of exercise when studying the asthmatic child. The severity of post-exercise bronchoconstriction depends upon the rate of working on the treadmill and the duration of exercise. A maximum response is obtained by six minutes of running at an uphill slope of 10% at a speed of 5 kmph (3 mph). Even with this type of test, there is still considerable variation in the resonse from time to time and greatest reproducibility is obtainde by repeating the test within one week. Treadmill exericise tests may be used in the diagnosis of asthma and in the assessment of its likely severity.