In this study, the success rate observed in children and adolescents evaluated was 92.3%. This shows that the respiratory muscle strength test is a simple resource, easy to apply and highly feasible in this age group. Further, it is a non-invasive method that supplies important information about the function of the respiratory muscles implicated in the breathing process, that are often involved in and/or at a mechanical disadvantage under several conditions or clinical situations, as in lung and neuromuscular diseases
In brief, the respiratory strength test presented a high rate of success among the pre-school and school population evaluated. Besides, the success rate appears to increase with age. The findings of this study show that the respiratory muscle strength test is a simple and easy to apply resource. Thus, obtaining an adequate test may ensure the quality of the measurements and consequently, success in the control and follow-up of the outcome of different respiratory involvements.