Objective
The principal objective is to understand the effect of respiratory muscle training on swimming performance.
Methodology
A systematic review was carried out by consulting trials published from 10 years ago to the present in the PubMed, Cochrane Library, Web of Science and Scopus databases. The inclusion criteria were clinical trials with young swimmers without respiratory pathology in which peak inspiratory pressure was measured and respiratory muscle training was performed as an intervention. Studies that were not clinical trials, with subjects with pathology and that did not perform respiratory muscle training were excluded. A table was manually made to extract the data from each article chosen for the systematic review. A Cochrane manual of systematic reviews was consulted to analyse risk of bias.
Results
9 clinical trials were selected to assess the effect of respiratory muscle training on swimming performance, and these studies were carried out in 223 swimmers. Each trial compared an intervention group, which generally had significant improvements in inspiratory muscle strength, with a control group, in which swimming training was performed.
Conclusion
Respiratory muscle training has turned out to be a method that generates positive effects on lung function and development of strength of the mainly inspiratory muscles. There are no conclusive results about performance improvement. The sample size is not relatively large, so it cannot be extrapolated to young swimmers.
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