Effect of different types of exercises on clinical control and psychosocial morbidity in the short term in moderate or severe asthmatics patients: randomized clinical trial

Author(s)

Milene Granja Saccomani

• Document type: Doctoral Thesis
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Faculdade de Medicina (FM/SBD)
• Defense date: 2014-12-12

Examining board members

Celso Ricardo Fernandes de Carvalho; Denise de Moraes Paisani; Regina Maria de Carvalho Pinto

• Advisor: Celso Ricardo Fernandes de Carvalho

Abstract

Asthma is a chronic inflammatory disorder of the airways responsible for the increase in bronchial responsiveness to various stimuli. Aerobic and breathing exercises are nonpharmacological strategies used in the treatment of asthmatic patients, however, the comparison between them has never been performed. Objective: To compare the effect of aerobic and breathing exercises on clinical control (primary outcome), psychosocial aspects, thoracoabdominal kinematics and autonomic response of patients with persistent moderateto- severe asthma (secondary outcome). Methods: Fifty-four patients with moderate or severe persistent asthma were randomized into breathing (BG, n=25, 50.6±9.2 yrs) or aerobic groups (AG, n=29, 49.8±9.7 yrs). BG performed yoga-breathing exercises while AG performed treadmill exercise beginning at 60% of the maximum predicted heart rate. Both interventions lasted 24 sessions (2x/week, 40 min/session, 3 months). Before and after the intervention and 3-months later, patients fulfilled asthma control (ACQ), health related quality of life (HRQoL), depression and anxiety levels (HAD) and hyperventilation symptoms (Nijmegen) questionnaires. Pulmonary function and aerobic capacity (incremental shuttle walking distance; ISWD) were also evaluated. Two-way ANOVA was used and significance level was set at 5%. Results: No difference between groups was detected at baseline (p > 0.05). After intervention, only AG reached a clinically significant difference in the ACQ-6 (p < 0.5) (AG=0.69±0.21 vs. BG=0.38±0.17) and presented improvement in HRQoL and anxiety symptoms (p < 0.05). Both groups had significant improvements in the Nijmegen scores (AG=6.5±0.8 vs. BG=3.7±0.9) and aerobic capacity (AG=96±26 vs. BG=63±17 meters) (p < 0.05). Conclusions: The results of this study suggest that patients with moderate or severe persistent asthma show benefits when subjected to both non-pharmacological strategies. Aerobic training resulted in greater benefits in clinical control, health related quality of life, psychosocial morbidities and aerobic capacity when compared to the breathing training. On the other hand, breathing training led to an improvement in mechanical efficiency and respiration. Both training had no influence on the autonomic response of asthmatic patients (AU)