Valenzuela Saúl, Miralles Rodolfo, Santander Hugo, Bull Ricardo, Cordova Rosa, Celhay Isabel, Cavada Gabriel, Gutiérrez Mario Felipe
a Faculty of Dentistry , Institute for Research in Dental Sciences, University of Chile , Santiago , Chile.
b Faculty of Medicine, Oral Physiology Laboratory, Biomedical Sciences Institute , University of Chile , Santiago , Chile.
Cranio. 2017 Mar;35(2):110-115. doi: 10.1080/08869634.2016.1159384. Epub 2016 Mar 25.
To compare the effect of breathing type on the activity of respiratory muscles at different body positions.
Two groups of 20 subjects each, one with upper costal and the other with costodiaphragmatic breathing, were studied. Electromyographic activity of sternocleidomastoid (SCM), diaphragm (DIA), external intercostal (EIC), and latissimus dorsi (LAT) muscles was recorded at standing and lateral decubitus positions during swallowing and maximal voluntary clenching.
All muscles showed higher activity during standing in upper costal breathing subjects except the SCM muscle. EIC activity was higher during standing in the costodiaphragmatic breathing group. Subjects with upper costal breathing showed higher DIA activity than subjects with costodiaphragmatic breathing at both body positions and higher SCM activity at lateral decubitus position, whereas, EIC activity was only higher during swallowing.
Subjects with upper costal breathing presented higher respiratory effort than subjects with costodiaphragmatic breathing, being most prominent at the lateral decubitus position.
