Analysis of Muscle Activity During Elevation and Overhead Throw

Á. Illyés (Hungary)


: Modeling, Biomechanics, Electromyography, Overhead throw


Shoulder problems are common in throwing sports. Although there is still much to learn, knowledge of sequential muscle activation about the shoulder is expanding. Further elucidation of muscle activity involved in overhead throw permits more specific conditioning to help improve performance, reduce injury, and assist rehabilitation in the event of injury. The aim of this study is to compare the muscle activity of recreational athletes and javelin throwers during elevation and overhead throw. Eight javelin throwers and seventeen recreational athletes without shoulder problems were examined. Signals were recorded by surface electromyography from 8 different muscles. The results obtained from the muscles of upper extremities of throwers were compared with those of recreational athletes. The different neuromuscular control of throwers caused a more profitable muscle activity. Differences during the learned motion are more significant. Deltoid muscles of recreational athletes show stronger activity than those of throwers. Muscles of the rotator cuff show stronger activity by the way (?) in throwers. These data may provide a basis for understanding improved performance and an adjunct for sports-specific rehabilitation programs.

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