In this meta-analysis, studies on swimming and asthma were divided into four groups: Group I compared frequency of asthma among elite swimmers to that of other athletes; Group II examined the association between asthma and swimming during childhood; Group III evaluated effects of swimming programs on asthma severity and pulmonary function; and Group IV compared immediate respiratory effects of swimming to those of other types of exercise. The summary results were expressed as meta-odds ratios (ORs) for binary endpoints such as presence of asthma, and meta-differences for continuous endpoints such as changes in post-exercise pulmonary function tests (PFTs). All summary measures of effect were calculated using random effects models accompanied by a corresponding 95% confidence interval (CI) and a test for heterogeneity. In the analysis comparing frequency of asthma among elite swimmers to that among other athletes (Group I), meta-ORs ranged from 2.3 to 2.6 with all 95% CIs excluding 1.0. The corresponding meta-ORs reflecting the association between asthma and swimming pool use during childhood (Group II) were in the 0.63-0.82 range and were not statistically significant. In comparison to swimming, running and/or cycling was associated with a statistically significant four-to six-fold increase in exercise induced bronchospasm. Although asthma is more commonly found among elite swimmers than among other high-level athletes, it is premature to draw conclusions about the causal link between swimming and asthma because most studies available to date used cross-sectional design, because the association is not confirmed among non-competitive swimmers, and because asthmatics may be more likely to select swimming as the activity of choice because of their condition.
"Athletes who participate in endurance sports seem to be at an increased risk for asthma than other athletes, possibly due to the vigorous activity and regularly repeated higher ventilation rates over prolonged periods of time associated with their discipline  . Swimmers might also be at high risk, as previous studies have suggested that pool athletes are predisposed to airway dysfunctions, including asthma, due to their exposure to irritants such as chlorine and derived by-products in the pool environment  . This international cross-sectional study offered a unique opportunity to assess differences in asthma prevalence between the European general population and European summer athletes from a wide range of sport disciplines across various geographical areas. "
"In addition, there is evidence that associates asthma risk and swimming. However, the risk depends on the target population . It was found that those who are occupationally exposed to the pool environment are at high risk of respiratory symptoms including asthma, although the causality of this association is uncertain. "
"Older swimmers tend to have spent less time at indoor swimming pools during childhood , as there were fewer indoor pools available ( García Ferrando & Llopis Coig , 2011 ) . Neverthe - less , some authors suggest further studies to confirm this hypothesis ( Goodman & Hays , 2008 ) . It should also be considered that the majority of subjects in the younger age group usually swim more intensely so are more susceptible to inhaling greater quantities of DBPs ( Bonetto et al . "
[Show abstract][Hide abstract] ABSTRACT: The objective of this study was to determine which chemical treatment used for disinfecting water in indoor swimming pools had the least impact on users' perceptions of health problems, and which generated the greatest satisfaction with the quality of the water. A survey on satisfaction and perceived health problems was given to 1001 users at 20 indoor swimming pools which used different water treatment methods [chlorine, bromine, ozone, ultraviolet lamps (UV) and salt electrolysis]. The findings suggest that there is a greater probability of perceived health problems, such as eye and skin irritation, respiratory problems and skin dryness, in swimming pools treated with chlorine than in swimming pools using other chemical treatment methods. Pools treated with bromine have similar, although slightly better, results. Other factors, such as age, gender, time of day of use (morning and afternoon) and type of user (competitive and recreational), can also affect the probability of suffering health problems. For all of the above, using combined treatment methods as ozone and UV, or salt electrolysis produces a lower probability of perceived health problems and greater satisfaction.
European Journal of Sport Science 01/2015; DOI:10.1080/17461391.2014.1001877 · 1.55 Impact Factor
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