Airway obstruction in competetive swimmers.

Abstract

<p><span style="font-size: 12px; font-family: Verdana;">Background: </span><span style="font-size: 12px; font-family: Verdana;">Swimming has been shown to cause beneficial effects on lung function. However, increased adverse effects have been hypothesized due to the air quality of indoor swimming pools. </span><span style="font-size: 12px; font-family: Verdana;">Objectives: To compare competitive swimmers present lung function to swimmers </span><span style="font-size: 12px; font-family: Verdana;">twenty to thirty </span><span style="font-size: 10.0pt;"><span style="font-family: Verdana; font-size: 12px;">years ago and examine the associations between lung function and medical history and reported respiratory symptoms in </span><span style="font-family: Verdana; font-size: 12px;">present swimmers. Methods: </span></span><span style="font-size: 12px; font-family: Verdana;">One hundred swi</span><span style="font-size: 10.0pt;"><span style="font-family: Verdana; font-size: 12px;">mmers, 47 females and 53 males were studied with flow-volume spirometry. These findings were compared with ones obtained 20 - 30 years ago among 98 swimmers, 40 females and 58 males. Forced expiratory volume in one second (FEV</span>_{<span style="font-family: Verdana; font-size: 12px;">1</span>}<span style="font-family: Verdana; font-size: 12px;">), forced expiratory volume (FVC) and their ratio (FEV%) were analysed for airways obstruction. Associations between lung function and asthma, allergy, and respiratory symptoms were examined using questionnaire. In addition airways inflammation was measured with exhaled ni</span><span><span style="font-family: Verdana; font-size: 12px;">tric oxide measurement (FE</span>_{<span style="font-family: Verdana; font-size: 12px;">NO</span>}<span style="font-family: Verdana; font-size: 12px;">) </span></span></span><span style="font-size: 12px; font-family: Verdana;">in present swim</span><span style="font-size: 12px; font-family: Verdana;">mers</span><span style="font-size: 12px; font-family: Verdana;">. Airborne </span><span style="font-size: 12px; font-family: Verdana;">trichloramine was measured in air of indoor swimming pools. </span><span style="font-size: 10.0pt;"><span style="font-family: Verdana; font-size: 12px;">Results: Airway obstruction was found in 15%, 15 out of 100 studi</span><span style="font-family: Verdana; font-size: 12px;">ed swimmers, which all reported physician dia</span><span style="font-family: Verdana; font-size: 12px;">gnosed asthma and/or family history of asthma. Most, 12 out of 15 of swimmers with obstruction finding, were males. Twenty to thirty years ago obstruction was found in 17 of the 98 swimmers. Airborne concentrations of trichloramine in the present swimming pools, were low, less than 0.1 mg/m</span>^{<span style="font-family: Verdana; font-size: 12px;">3</span>}<span style="font-family: Verdana; font-size: 12px;">. </span></span><span style="font-size: 12px; font-family: Verdana;">Conclusion:</span><span style="font-size: 10.0pt;"><span style="font-family: Verdana; font-size: 12px;"> Airway obstruction was associated with asthma and family history of asthma. There was no increase in obstruction findings among competitive swimmers within 2 - 3 decades. </span><span style="font-family: Verdana; font-size: 12px;">Measured concentrations of trichloramine raised</span><span style="font-family: Verdana; font-size: 12px;"> no concern on swimmers health.</span></span></p>