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Iatreia
Print version ISSN 0121-0793
Abstract
SANCHEZ-DELGADO, Juan Carlos; JACOME-HORTUA, Adriana; AGUIRRE-AGUIRRE, Clara Liliana and ANGARITA-FONSECA, Adriana. Acute effect of moderate-intensity exercise on spirometric variables in broncodilated asthmatic subjects. A pilot study. Iatreia [online]. 2019, vol.32, n.1, pp.7-15. ISSN 0121-0793. https://doi.org/10.17533/udea.iatreia.v32n1a01.
Background:
Exercise-Induced Bronchospasm (BIE) occurs in 70 % to 80 % of asthmatics and its occurrence is more frequent at the end of a session of physical exercise, mainly of vigorous intensity.
Objective:
To evaluate the acute effect of moderateintensity physical exercise on spirometric variables in asthmatic subjects.
Methodology:
A before-and-after type quasi-experimental design. Ten subjects were included (mean age= 23 ± 4 years), which were divided into two groups: five asthmatic subjects and five healthy subjects. Both groups performed 10 min of warm-up, 20 min of treadmill exercise at an intensity of 60 % of the Heart Rate Reserve, and a final cool-down of 5 minutes. Lung function was assessed before and 15 minutes after exercise.
Results:
There were statistically significant differences between groups (with asthma = 6 % vs. without asthma = -1 %, p = 0.03) in the pre-post-exercise changes of the ratio of the forced expiratory volume in one second and the forced vital capacity (FEV1/FVC). The multivariate analysis showed that post-exercise FVC in subjects with asthma was significantly lower than in subjects without asthma, after adjusting for the baseline assessment and total body mass.
Conclusion:
Moderate-intensity exercise on a treadmill did not shows clinically significant differences on the changes pre-post exercise of the studied spirometric variables, since the changes on FEV1 or FVC did not exceed 10 % having as reference the baseline evaluation.
Keywords : Asthma, Exercise-Induced; Airway Obstruction; Body Composition; Motor Activity; Spirometry.