A simple exercise test in assessment of asthma

Area of Science:

• Pulmonology
• Exercise Physiology
• Allergy & Immunology

Background:

• Exercise-induced asthma (EIA) is a common manifestation of bronchial hyper-responsiveness in asthma patients.
• Standardized laboratory methods exist for measuring EIA, but simplified, sensitive alternatives are valuable.

Purpose of the Study:

• To compare the sensitivity of a simplified stepping exercise test against a standard treadmill test for detecting EIA.
• To evaluate the utility of a simplified test in assessing asthmatic patients and therapeutic effects.

Main Methods:

• 32 adolescent asthmatic patients underwent both treadmill and stepping exercise tests.
• Exercise intensity was monitored via heart rate.
• Bronchial responsiveness was measured by changes in forced expiratory volume in 1 second (FEV1).

Main Results:

• A significant fall in FEV1 (≥10%) was observed in 27 patients after the treadmill test and 25 after the stepping test.
• A strong correlation (r = 0.92) was found between FEV1 falls from both tests.
• Patient history poorly predicted objective EIA findings, with some denying exercise triggers showing significant FEV1 decline.

Conclusions:

• A simplified stepping exercise test is objective and sensitive for detecting EIA.
• This simplified test is a useful tool for assessing asthmatic patients and monitoring treatment efficacy.
• Objective exercise challenge tests are crucial, as patient-reported symptoms may not fully capture EIA prevalence.