Exercise-Induced Bronchoconstriction is Most Common in Athletic Individuals
Athletic individuals are most liable to have exercise-induced bronchoconstriction (EIB), not hearing loss, vision disturbances, or impaired olfactory function. 1
Prevalence of EIB in Athletic Populations
Exercise-induced bronchoconstriction is remarkably common among athletes, particularly those participating in certain sports:
- Elite cross-country skiers: 30-50% prevalence, with some studies reporting up to 78% showing symptoms or bronchial hyperresponsiveness 1
- Long-distance runners: 17% prevalence 1
- Speed runners: 8% prevalence 1
- Winter Olympic athletes: 23% overall prevalence (26% in females, 18% in males) 1
- Ice skaters: 20-35% prevalence 1
Environmental and Sport-Specific Risk Factors
The high prevalence of EIB in athletes is associated with specific environmental conditions:
- Cold dry air exposure: Particularly affects winter sport athletes like cross-country skiers 1
- Poor air quality:
- Duration of exposure: Swimmers with >100 hours of chlorinated pool exposure show higher EIB prevalence 1
Demographic Factors Affecting EIB Risk
Several demographic factors influence EIB prevalence:
- Sex differences: Female athletes show higher prevalence (26%) compared to males (18%) in winter sports 1
- Age factors: EIB frequency decreases with increasing age 1
- Urban vs. rural: Higher prevalence in urban settings (8.9%) compared to rural environments (7%) 1
- Racial/ethnic differences: African Americans show higher prevalence (13%) compared to white subjects (2%) 1
Why Not Hearing Loss?
While noise exposure can cause hearing loss in various populations, the evidence does not support that athletic individuals are specifically more prone to hearing loss:
- Age-related hearing loss is more common in males than females, but this is attributed to occupational and noise exposures, not athletic activity 1
- Hearing loss is associated with aging and is a significant risk factor for other conditions like dementia, depression, and falls 1
- While a case report describes sudden sensorineural hearing loss after a cycling class 2, this represents an isolated incident rather than a pattern among athletes
Clinical Implications
For healthcare providers working with athletic populations:
- Screening: Consider screening for EIB in athletes, especially those participating in winter sports, swimming, or sports in polluted environments
- Prevention: Advise athletes about environmental risk factors that may trigger EIB
- Treatment: Early intervention for EIB can improve athletic performance and prevent long-term respiratory complications
- Education: Inform athletes that EIB symptoms may be mistaken for poor conditioning
Conclusion
The evidence clearly indicates that athletic individuals are most liable to have exercise-induced bronchoconstriction, particularly those participating in specific sports with environmental triggers like cold air, chloramines, or air pollution. Healthcare providers should be vigilant about screening for and managing EIB in athletic populations.