Respiratory muscle strength in children with mild bronchial asthma disease

Katerina Neumannova, Zuzana Kovacikova, Jakub Zatloukal, Milan Elfmark, Jana Rydlova, Miroslav Janura

Respiratory muscle strength in children with mild bronchial asthma disease

Číslo: 4/2017
Periodikum: Acta Gymnica
DOI: 10.5507/ag.2017.023

Klíčová slova: maximal inspiratory mouth pressure, maximal expiratory mouth pressure, ventilatory parameters, breathlessness, physical activities, maximální inspirační tlak v ústní dutině, maximální výdechový tlak v ústní dutině, ventilační parametry, dechová duše, fyzické aktivity

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Anotace: Background: Respiratory muscle strength can be decreased in patients with asthma; however, it is not well-documented whether a mild bronchial asthma disease can affect respiratory muscle strength in children and can be associated with higher presence of breathing difficulties.

Objective: The main aim of the present study was to compare respiratory muscle strength between children with asthma and age-matched healthy children. The next aim of this study was to assess the incidence of decreased respiratory muscle strength in children with asthma and healthy children and assess the effect of decreased respiratory muscle strength on the incidence of breathing difficulties.

Methods: Children with mild bronchial asthma (n = 167) and age-matched, healthy children (n = 100) were recruited into this study. Pulmonary function tests, maximal inspiratory (PImax) and expiratory (PEmax) mouth pressures and the incidence of breathing difficulty were evaluated in children with asthma and healthy controls.

Results: The inspiratory muscle strength was similar between children with asthma and healthy children. Conversely, the expiratory muscle strength was lower in asthmatic children. There was a statistically significant difference between girls with asthma and healthy girls (PEmax = 81.7 ± 29.8% vs. 100.1 ± 23.7% of predicted, p < .001). PEmax was significantly higher in boys with asthma than in girls with asthma (PEmax = 92.9 ± 26.4 % vs. 81.7 ± 29.8% of predicted, p = .03). A higher incidence of breathing difficulties during physical activity (uphill walking, running, swimming) was confirmed in children with asthma with lower respiratory muscle strength.

Conclusions: There was a higher prevalence of decreased expiratory muscle strength in children with asthma; therefore, respiratory muscle strength should be tested in these children, especially in those who are symptomatic.