Determinants of inspiratory muscle strength in healthy humans

BROWN, P.I., JOHNSON, M.A. and SHARPE, G.R., 2014. Determinants of inspiratory muscle strength in healthy humans. Respiratory Physiology & Neurobiology, 196, pp. 50-55. ISSN 1569-9048

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Abstract

We investigated 1) the relationship between the baseline and inspiratory muscle training (IMT) induced increase in maximal inspiratory pressure (PI,max) and 2) the relative contributions of the inspiratory chest wall muscles and the diaphragm (Poes/Pdi) to PI,max prior to and following-IMT. Experiment 1: PI,max was assessed during a Müeller manoeuvre before and after 4-wk IMT (n=30). Experiment 2: PI,max and the relative contribution of the inspiratory chest wall muscles to the diaphragm (Poes/Pdi) were assessed during a Müeller manoeuvre before and after 4-wk IMT (n=20). Experiment 1: PI,max increased 19% (P<0.01) post-IMT and was correlated with baseline PI,max (r=−0.373, P<0.05). Experiment 2: baseline PI,max was correlated with Poe/Pdi (r=0.582, P<0.05) and after IMT PI,max increased 22% and Poe/Pdi increased 5% (P<0.05). In conclusion, baseline PI,max and the contribution of the chest wall inspiratory muscles relative to the diaphragm affect, in part, baseline and IMT-induced ΔPI,max. Great care should be taken when designing future IMT studies to ensure parity in the between-subject baseline PI,max.

Item Type: Journal article
Publication Title: Respiratory Physiology & Neurobiology
Creators: Brown, P.I., Johnson, M.A. and Sharpe, G.R.
Publisher: Elsevier
Place of Publication: Amsterdam, Netherlands
Date: 2014
Volume: 196
ISSN: 1569-9048
Identifiers:
NumberType
10.1016/j.resp.2014.02.014DOI
Divisions: Schools > School of Science and Technology
Depositing User: EPrints Services
Date Added: 09 Oct 2015 10:19
Last Modified: 09 Jun 2017 13:26
URI: http://irep.ntu.ac.uk/id/eprint/11136

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