Exercise-induced bronchoconstriction (EIB) is high among ice rink athletes and may be related to exercise ventilation of rink air pollutants. Impaired postchallenge expiratory flows are common for this population; however, baseline lung function and symptoms have not been fully evaluated.Methods
We examined resting lung function and asthma-like symptoms in relation to airway hyperresponsiveness in National Team female ice hockey players (N = 43). Subjects were grouped according to observed symptoms and medical history as symptomatic (‘S’) or asymptomatic (‘A’). Baseline and postexercise lung function was determined.Results
Seventeen (39.5%) presented symptoms and 9 (21%) had EIB. Baseline FEV1, FEV1/FVC, and FEF25–75 were different between ‘S’ and ‘A’ (102 ± 14% vs 116 ± 12%, 77.7 ± 7.5 vs 88.2 ± 4.5, and 74 ± 22% vs 118 ± 24%, respectively; P < 0.05); FVC and PEF were not different. Ten ‘S’ athletes had <80% FEV1/FVC; 9 had <70% predicted FEF25–75. Six of 9 EIB+ subjects had symptoms; cough occurred in all six and was related to EIB (χ2 = 4.23, OR = 6.5, CI = 1.1–44.1; P = 0.039).Conclusion
Baseline lung function is related to symptoms and precludes EIB in some rink athletes, suggesting that EIB and its development is a heterogeneous and may involve fibrotic as well as inflammatory processes. Small airway dysfunction in ice arena athletes is likely related to internal combustion pollutants emitted from ice resurfacing machines.