Comparison of Electromyographic Activity of shoulder muscles during push-up variations on stable and unstable surfaces

Authors

1 MSc, Department of Corrective Exercises and Sports Injuries, Faculty of Physical Education and Sport Sciences, University of Allame Tabatabaii, Tehran, Iran

2 Assistant professor, Department of Corrective Exercises and Sports Injuries, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran

3 MSc, Department of Corrective Exercises and Sports Injuries, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran

Abstract

Abstract
 
Background: Surface instability is a common addition to traditional rehabilitation and strength exercises with the aim of increasing muscle activity. The aim of the current study is to determine if performing push up exercise variations on an unstable surface (Swiss ball and TRX) influences EMG amplitude of the shoulder gridle muscles when compared with a stable surface.
 
Methodology: A convenience sample of 10 subjects performed 3 repetitions for each exercise. Surface electromyograms were recorded from the triceps, pectoralis major, anterior deltoid and serratus anterior while performing push up exercises with the feet or hands placed on bench, TRX and swiss ball.
 
Results: TRX and Swiss ball push-ups resulted in greater activation in the pectoralis major and anterior deltoid than those performed on the bench (p≤0.05). The triceps and serratus anterior muscles showed increases in muscle activity when respectively the hands and feet were on the unstable surface (p≤0.05).
 
Conclusion: The results of this study indicate that using unstable surfaces will increase the intensity of exercise. The greatest challenge for pectoralis major and anterior deltoid muscles is suggested push up exercises when the hands placed swiss ball And also for triceps and serratus anterior muscles, respectively, from unstable surfaces in the hands and feet.
 

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