PT  - JOURNAL ARTICLE
AU  - Ivanizia Silva
AU  - Renata Delgado
AU  - Victor Oliveira
AU  - Taina Fernandes
AU  - Italo Queiroz
AU  - Thaisy Silva
AU  - Nelson Lima Filho
AU  - Rafaela Pedrosa
AU  - Gardenia Ferreira
TI  - Effects of inspiratory muscle training on electromyographic activity of inspiratory muscles in asthmatics
DP  - 2014 Sep 01
TA  - European Respiratory Journal
PG  - P3359
VI  - 44
IP  - Suppl 58
4099  - http://erj.ersjournals.com/content/44/Suppl_58/P3359.short
4100  - http://erj.ersjournals.com/content/44/Suppl_58/P3359.full
SO  - Eur Respir J2014 Sep 01; 44
AB  - Background: Electromyographic evaluation provides quantitative information about the specific function of each muscle. Thus it can be used to justify the effect of inspiratory muscle training (IMT) on the inspiratory muscles. Objectives: To investigate the effects of IMT on surface electromyographic (sEMG) activity of inspiratory muscles in healthy and asthmatics adults. Methods: We performed a randomized controlled trial with blinding of outcome assessment. Ten healthy and 10 asthmatics were randomly divided into two groups (experimental and control). Participants performed 30 breaths, using a pressure threshold inspiratory muscle trainer (POWERbreathe®), twice a day, five days/week, for a total of six weeks at home. Training intensity was adjusted once a week. Experimental group trained at 50% MIP and control group at 15% MIP. sEMG activities of sternocleidomastoid (SCM) and diaphragm muscles were measured during basal respiration and maximum inspiratory pressure maneuver, before and after the six week of IMT. Results: Asthmatic experimental group demonstrated a significant increase in sEMG activity of diaphragm at 48,5% (P<0,05) during basal respiration posttraining. Moreover the sEMG activity of SCM significant increases during maximum inspiratory pressure maneuver in healthy experimental group (1488%; P<0,05) and asthmatic experimental group (1186,4%; P<0,05) when compared with the baseline measurements. There were no statistically significant changes in the control groups. Conclusion: IMT was able to promote an increase in sEMG activity of diaphragm muscle in the asthmatics, and an increase SCM in healthy and asthmatic adults.