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  • Title: Shoulder muscle activity during pushing, pulling, elevation and overhead throw.
    Author: Illyés A, Kiss RM.
    Journal: J Electromyogr Kinesiol; 2005 Jun; 15(3):282-9. PubMed ID: 15763675.
    Abstract:
    PURPOSE: The aim of this study was to compare the muscle activity of recreational athletes and professional javelin throwers during pull, push, and elevation of upper extremities and during overhead throw. SCOPE: Nine professional javelin throwers and 16 recreational athletes without shoulder problems were studied. Signals were recorded by surface EMG from eight different muscles. The results obtained from the muscles of upper extremities of throwers were compared with those of recreational athletes. CONCLUSION: The different neuromuscular control of professional throwers caused a more profitable muscle activity. Differences during the overhead throw were more significant. The deltoid muscle and rotator cuff of recreational athletes showed stronger activity than those of throwers during pull, push and elevation. The deltoid muscle and the rotator cuff of professional throwers showed stronger activity during overhead throw. Studying the detailed characteristics of muscle activity pattern (differences in length of activity periods, MVC% of muscles and time broadness among peak muscle activities in percent of total time of a movement cycle) may provide a basis for better understanding improved performance and help in planning proper rehabilitation protocol.
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