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Romanian Society for Sports Medicine



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"Sport Medicine Journal" No.13 - 2007
ORIGINAL PAPERS – abstract


Isotonic Evaluation of Peak Force in Overhead Athletes with Shoulder  Impingement Syndrome

Vikrant Mohan Miglani, Shweta Shenoy, Jaspal Singh Sandhu
Department of Sports Medicine and Physiotherapy, Guru Nanak Dev University, Amritsar, State- Punjab, India

Abstract.

Background: Overhead activities such as throwing, tennis, or volleyball place athletes at considerable risk for overuse injuries. A relationship between scapulothoracic muscle imbalance and shoulder pain has been suggested.
Objective: To compare the peak force during scapular movements during concentric and eccentric contraction in overhead athletes with impingement syndrome and without impingement syndrome.
Design and Methodology: Experimental study with different subject design. 20 overhead athletes from various sports were participated in this study. 10 athletes had shoulder impingement syndrome and 10 were healthy athletes. Surface electromyographic data were collected. Isotonic peak force was evaluated during protraction-retraction and Scaption-depression with two different loading conditions (i) 2kg load and (ii) 6 kg load. Results: Isotonic peak force values for protraction-retraction and scaption-depression were 6 % - 12 % (p<0.005) less on the injured side (Right) of impingement group when compared to the same side of the control (Non-impingement) group and also the force is decreased 5 % - 14 % (p<0.05) during all scapular movements, when compared to non-injured side of impingement group.
Force-Body weight ratio was decreased by 7 % - 13 % ( p<0.05) on injured side of impingement group when compared to the same side of the control group and force-Body weight ratio was decreased by 5 % - 14 % (p<0.05) during all scapular movements when compared to non-injured side of impingement group.
Conclusion: Overhead athletes demonstrate decrease in peak force and force- body weight ratio on the impingement side when compared to their non-injured side; also the peak force and force- body weight ratio in impingement patients was decreased when compared to normal athletes.

Key words:

isotonic, force, scapular movements.



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