Electromyographic activities of the abdominal muscles during 30 % and 75 % of maximum expiratory pressure

Publication date: Available online 22 December 2016
Source:Journal of Bodywork and Movement Therapies
Author(s): Hiroshi Ishida, Mai Fujisawa, Ryo Yokoyama, Tadanobu Suehiro, Susumu Watanabe
The aim of this study was to quantify the activities of the rectus abdominis (RA), external oblique (EO), and internal oblique (IO) muscles during 30% and 75% of maximum expiratory pressure (PE max).Fifteen healthy male university students participated in this study. Electromyographic (EMG) activities of the RA, EO, and IO muscles were measured during 30% and 75% of PE max and then normalized relative to maximum voluntary contractions (%MVC).All muscles during 75% of PE max showed significantly higher %MVC compared to that during 30% of PE max (P < 0.01). The EO and IO muscles showed significantly higher %MVC compared to the RA muscle during 30% and 75% of PE max (P < 0.05).Muscle endurance and strength induced by expiratory muscle strength training might be different in each abdominal muscle.



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