The effects of ball impact position on shoulder muscle activation during spiking in male volleyball players
| Autor: | Yasuyuki Ishibashi, Kazutomo Miura, Masakazu Kogawa, Eiichi Tsuda |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
medicine.medical_specialty
lcsh:Diseases of the musculoskeletal system shoulder Deltoid curve Isometric exercise Electromyography spiking Article Physical medicine and rehabilitation ball impact position lcsh:Orthopedic surgery Deltoid muscle mental disorders Medicine Orthopedics and Sports Medicine Ball impact muscle activation deltoid muscle medicine.diagnostic_test Kinesiology business.industry Shoulder muscle body regions Volleyball lcsh:RD701-811 medicine.anatomical_structure Shoulder girdle Surgery lcsh:RC925-935 business human activities psychological phenomena and processes |
| Zdroj: | JSES International, Vol 4, Iss 2, Pp 302-309 (2020) JSES International |
| ISSN: | 2666-6383 |
| DOI: | 10.1016/j.jseint.2019.12.009 |
| Popis: | Background The ball impact position during spiking in volleyball may influence the pattern of activation of shoulder girdle muscles and, therefore, could be a significant risk factor for shoulder injury. Methods Activation of 10 muscles in the dominant shoulder was evaluated using surface electromyography (EMG) in 11 male volleyball players, during spiking in a static standing position, with the goal being to precisely control the specified ball impact positions, without a run-up or ball setting. The following 4 ball impact positions were evaluated: standard, posterior, medial, and lateral. The EMG amplitude, normalized to the maximal voluntary isometric contraction of the respective muscles, was compared for each phase of the spiking movement between the standard position and the other 3 different impact positions, using the Dunnett test. Results The following between-position differences were noted for the deltoid muscle: increased activation of the anterior deltoid during the acceleration phase for the posterior position (P = .041), increase in the posterior deltoid during the acceleration phase for the lateral position (P = .04), and increase in the middle deltoid during the deceleration phase for the lateral position (P = .005). Conclusion A posterior or lateral shift in the position of ball impact may cause an increase in the activity of the deltoid muscle that would cause a decrease in the centripetal force of the humeral head through the acceleration and deceleration phases. As such, neuromuscular exercises, combined with strengthening of the rotator cuff muscle, might reduce the risk of shoulder injury during performance of the volleyball spiking movement. |
| Databáze: | OpenAIRE |
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