Screening of exercise-induced asthma using exercise in subzero temperature air

Not Applicable

• Conditions: Exercise-induced bronchoconstriction; Respiratory

• Registration Number: ISRCTN12919627
• Lead Sponsor: meå University

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2022-09-29
• Last Update Posted: 18 September 2023
• Study Completion: 2026-12-31

Recruitment & Eligibility

• Status: Ongoing
• Sex: All
• Target Recruitment: 100

Inclusion Criteria

Current or former students at Swedish National Elite Sports Schools in cross-country skiing and biathlon participating in a survey on heat- and moisture-exchanging breathing masks, airway symptoms, and asthma.

Exclusion Criteria

Airway infection within 4 weeks prior to exercise challenge

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Prevalence of exercise-induced bronchoconstriction, defined as the maximal reduction in FEV1 of >= 10%, measured using dynamic spirometry 5, 10, 15, 20, and 30 minutes post challenge

Secondary Outcome Measures

Name	Time	Method
Prevalence of exercise-induced bronchoconstriction, defined as the maximal increase in airway resistance (R5) of >= 40%, measured using impulsoscillometry at 3,8,13,18, and 28 minutes post challenge