Responses of intra-abdominal pressure and abdominal muscle activity during dynamic trunk loading in man

Cresswell A.G. (1993) Responses of intra-abdominal pressure and abdominal muscle activity during dynamic trunk loading in man. European Journal of Applied Physiology and Occupational Physiology, 66 4: 315-320. doi:10.1007/BF00237775


Author Cresswell A.G.
Title Responses of intra-abdominal pressure and abdominal muscle activity during dynamic trunk loading in man
Journal name European Journal of Applied Physiology and Occupational Physiology   Check publisher's open access policy
ISSN 0301-5548
Publication date 1993-02-01
Year available 1993
Sub-type Article (original research)
DOI 10.1007/BF00237775
Open Access Status Not yet assessed
Volume 66
Issue 4
Start page 315
End page 320
Total pages 6
Place of publication NEW YORK
Publisher Springer-Verlag
Language eng
Abstract The purpose of this study was to determine and compare interactions between the abdominal musculature and intra-abdominal pressure (IAP) during controlled dynamic and static trunk muscle loading. Myoelectric activity was recorded in six subjects from the rectus abdominis, obliquus externus, obliquus internus, transversus abdominis and erector spinae muscles using surface and intra-muscular fine-wire electrodes. The IAP was recorded intra-gastrically. Trunk flexions and extensions were performed lying on one side on a swivel table. An adjustable brake provided different friction loading conditions, while adding weights to an unbraked swivel table afforded various levels of inertial loading. During trunk extensions at all friction loads, IAP was elevated (1.8-7.2 kPa) with concomitant activity in transversus abdominis and obliquus internus muscles-little or no activity was seen from rectus abdominis and obliquus externus muscles. For inertia loading during trunk extension, IAP levels were somewhat lower (1.8-5.6 kPa) and displayed a second peak when abdominal muscle activity occurred in the course of decelerating the movement. For single trunk flexions with friction loading, IAP was higher than that seen in extension conditions and increased with added resistance. For inertial loading during trunk flexion, IAP showed two peaks, the larger first peak matched peak forward acceleration and general abdominal muscle activation, while the second corresponded to peak deceleration and was accompanied by activity in transversus abdominis and erector spinae muscles. It was apparent that different loading strategies produced markedly different patterns of response in both trunk musculature and intra-abdominal pressure.
Keyword Abdominal
Electromyography
Intra-abdominal pressure
Muscles
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 14 Feb 2017, 16:01:11 EST by Sandrine Ducrot