PT  - JOURNAL ARTICLE
AU  - Valerie Bougault
AU  - Julie Turmel
AU  - Louis-Philippe Boulet
TI  - Comparison of airway damage after swimming and indoor cycling in swimmers
DP  - 2013 Sep 01
TA  - European Respiratory Journal
PG  - P4973
VI  - 42
IP  - Suppl 57
4099  - http://erj.ersjournals.com/content/42/Suppl_57/P4973.short
4100  - http://erj.ersjournals.com/content/42/Suppl_57/P4973.full
SO  - Eur Respir J2013 Sep 01; 42
AB  - Background : The respective roles of exercise ventilation and chlorine byproducts inhalation on the development of airway disorders observed in competitive swimmers remain to be determined.Aim : To compare the effect of an exercise performed in a chlorinated swimming pool and on an bicycle at a same heart rate on pulmonary epithelium in swimmers.Methods : Changes of pneumoproteins (surfactant-associated protein D (SP-D) and Clara cell protein (CC16)) were measured in the serum of 17 swimmers (19±3 years) before and 10 min after two identical training sessions: swimming (S) and cycling (C) sessions. Both sessions were performed at the same heart rate (166±7 b.min-1), at the same hour of the afternoon, and separated by at least one day. The total duration of each training was 41±1min, constituted of 6 to 8 repetitions of exercise periods (mean duration: 316±19sec) separated by one minute rest. A spirometry was performed before and 5 min after each session. During S, trichloramines varied from 0.2 to 0.5 ppm in the water and from 0.4 to 1.2 mg.m-3 in the air.Results : No swimmers had a bronchoconstriction after S or C. No significant difference in serum CC16, SP-D, CC16/SP-D was observed at rest before S and C. The SP-D and CC16 were significantly increased in blood after S (p<0.0001) and C (p<0.05), but the ratio CC16/SP-D was significantly increased after S only (p=0.002). The variation was greatest after S than after C, for CC16 (mean relative increase after S: 105% vs C: 80%, p=0.002) and SP-D (mean relative increase: 28% after S and 12% after C, p=0.01).Conclusion : Our study suggests that exercise induces airway damage, probably increased by chlorine by-products inhalation.