masterThesis
Efeitos agudos do alongamento de músculos respiratórios em asmáticos: estudo cross-over, randomizado e duplo-cego
Fecha
2015-04-30Registro en:
AGUIAR, Kardec Alecxandro Abrantes. Efeitos agudos do alongamento de músculos respiratórios em asmáticos: estudo cross-over, randomizado e duplo-cego. 2015. 73f. Dissertação (Mestrado em Fisioterapia) - Centro de Ciências da Saúde, Universidade Federal do Rio Grande do Norte, Natal, 2015.
Autor
Aguiar, Kardec Alecxandro Abrantes
Resumen
Introduction: Asthma is an inflammatory disease which attacks may reverse
spontaneously or with pharmacological treatment. Prolonged exposure to its effects may
impair action of the respiratory muscles. Thus, while the stretching these muscles is
seen as a potential technique benefit in the treatment and control of chronic lung
disease, few studies evaluated asthmatics. Objectives: Assess the acute effects of a
stretching protocol of respiratory muscles on lung volumes, respiratory rate, minute
volume, shortening velocity index of respiratory muscles and exercise tolerance in
asthmatics with controlled disease. Materials and methods: crossover, randomized,
double-blind study in which the sample was composed of asthmatic allocated into two
groups: stretching group (GA) and placebo group (PG). The GA received a stretching
protocol, while the GP, placebo maneuver. The variables were analyzed during the
exercise using plethysmography optoelectronics. Statistical analysis: the mean of lung
volumes, respiratory rate, minute volume and velocity of shortening index of the
respiratory muscles between groups were compared by two-way ANOVA with
Bonferroni post hoc. The exercise tolerance time and perceived exertion were compared
between groups by paired t test. Was considered significant statistical value p <0.05.
Preliminary results: We assessed 11 asthmatic with a mean age of 35.5 ± 7.8 years,
BMI 24.4 ± 2.4 kg / m2, FVC and FEV1 equal to 95.8 ± 10.3 and 85.3 ± 11, 5% of the
predicted value, respectively. There were no differences in lung volumes between
groups (stretching versus placebo) during exercise, occurring differences in intra-group
analysis of its stages (p <0.01). The respiration rate, and minute volume were similar in
both groups (p = 0.68 and 0.52). The shortening velocity index of the inspiratory
muscles pulmonary rib cage was lower in the stretching group, particularly in moments
of pedaling load (GP = 0.571 ± 0.222, 0.533 ± 0.204 GA = L / s) and recovery (GP =
0.591 ± 0.222, GA = 0.531 ± 0.244 L / s), however there was no statistically significant
difference (p = 0.27). The time of exercise tolerance was similar between groups (GP =
245 ± 109 seconds versus 218 ± GA = 55.5 sec, p = 0.31). The change in Borg score for
perception of fatigue was lower in GA (6.86 ± 0.55 versus 7.59 ± 0.73, p = 0.02).
Conclusion: The stretching of respiratory muscles, considering its acute effects, does
not modify the pulmonary volumes, respiratory rate, minute volume and the shortening
velocity index of respiratory muscles of asthma patients with controlled disease. The
results suggest that the technique did not influence exercise tolerance with constant
load, although it was observed a lower sense of fatigue in individuals who underwent
technique.