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Journal of Speech, Language, and Hearing Research Vol.48 1325-1333 December 2005. doi:10.1044/1092-4388(2005/092)
© American Speech-Language-Hearing Association
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Examination of Strength Training and Detraining Effects in Expiratory Muscles

Susan Baker 1
Paul Davenport 1

Christine Sapienza 1
1 University of Florida, Gainesville

bakerse1{at}muohio.edu

Purpose: The purpose of this study was to determine strength gains following expiratory muscle strength training (EMST) and to determine detraining effects when the training stimulus is removed.

Method: Thirty-two healthy participants were enrolled in an EMST program. Sixteen participants trained for 4 weeks (Group 1) and 16 participants trained for 8 weeks (Group 2). All 32 participants were detrained for 8 weeks. Maximum expiratory pressure (MEP) was used to document change in expiratory muscle strength throughout the study.

Results: Group 1 had a 41% increase and Group 2 had a 51% increase in MEP following the training. Mean MEP, for both groups, was significantly greater than baseline at the end of the training period (p = .0001), at the 4th week of detraining (p = .0001), and at the 8th week of detraining (p = .0001). The results also indicated that there was no significant difference in mean MEP between the groups at baseline, end of training, or throughout the detraining period (p = .960).

Discussion: The results suggest that expiratory muscle strength gains following a 4- and 8-week EMST program do not differ significantly. Additionally, detraining rates do not appear to be dependent on length of training time.

KEY WORDS: expiratory muscles, training, detraining

Submitted on July 15, 2004
Revised on December 18, 2004
Accepted on April 28, 2005


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