Comparison of trunk muscle activity between exercises performed on a gym ball and on a plinth

Pao Yue-kong Library Electronic Theses Database

Comparison of trunk muscle activity between exercises performed on a gym ball and on a plinth

 

Author: Leung, Yau-man Calson.
Title: Comparison of trunk muscle activity between exercises performed on a gym ball and on a plinth
Degree: M.Sc.
Year: 2006
Subject: Hong Kong Polytechnic University -- Dissertations
Neuromuscular diseases -- Diagnosis
Backache -- Exercise therapy
Electromyography
Department: Dept. of Rehabilitation Sciences
Pages: ix, 60 leaves : col. ill. ; 30 cm.
InnoPac Record: http://library.polyu.edu.hk/record=b1986351
URI: http://theses.lib.polyu.edu.hk/handle/200/5445
Abstract: Core stability training is very important for the prevention and management of low back pain. The use of labile surface like gym ball is becoming more popular for strengthening the trunk musculatures and stimulating the neuromuscular system during core stability exercise. Recent researches only investigate the muscle activities during abdominal trainings on gym ball. However little evidence is known about the activity of trunk muscles during core stability exercises on and off the labile surface. The purpose of this study was to compare the electromyographic (EMG) activity of the abdominal and back musculature during four core stability exercises on and off the gym ball. Twenty-one healthy male subjects (25.1±2.6 years old) without any history of low back pain volunteered to participate in this study. They were instructed to perform push-up with feet on supporting surface, push-up with hands on supporting surface, side-bridge and trunk extension on a gym ball and on a plinth in a randomised order. Electromyographic activity of rectus abdominis, external oblique, internal oblique and multifidus were monitored. Action potentials were recorded and analysed from the four trunk muscles during a 5-second isometric contraction, and all data was normalised to maximal voluntary isometric contraction (MVC). Paired t-tests and Bonferroni's correction were performed on percentage of maximal voluntary contraction of each muscle group during a single exercise on and off the gym ball.
There were significant increases in muscle activation of the rectus abdominis (p<0.001), the external oblique (p<0.001) and the internal oblique (p<0.001) during the push-up exercise with hands on gym ball. Interestingly, there was also a significant increase in muscle activity of the external oblique during side-bridge on gym ball (p<0.001) and increased multifidus activity during the side-bridge on stable supporting surface (p<0.00l). The addition of gym ball did not influence trunk muscle activity during push-up with feet on ball and trunk extension on ball. The findings from the present study suggested that push-up with hands on gym ball would be effective for strengthening the abdominal muscles, while side-bridge exercise on plinth would be an appropriate endurance training for the erector spinae muscle. Further research on the efficacy of core stability training on labile surface, especially the long-term effect after a period of training is essential.

Files in this item

Files Size Format
b19863512.pdf 4.645Mb PDF
Copyright Undertaking
As a bona fide Library user, I declare that:
  1. I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
  2. I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
  3. I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.

     

Quick Search

Browse

More Information