Emg Study Of The Pectoralls Major, Teres Major (sternal Portion), Teres Major, Latissimus Dorsi And Deltoid Medial Muscles In Volleyball Players

Introduction
According to Rokito et al. (1998) there is a great incidence of shoulder injuries in volleyball athletes. The sport
demands a great number of over-the-head movements with the arms leading to an overload of the ligaments and
muscles. For Basmajian (1976) the EMG is the means to know more the muscular neurophysiology.

Methods
8 male individuals who practice volleyball in the youth category, (between 15 to 17 years old; average ± 16,25 years
old), right-handed, and involved with volleyball for, at least, one year. The aim of this study was to analyze the action
potential of these muscles during the volleyball movements: service, spike, pass, set and blocking, with and without
ball.

Results
None of the studied muscles showed significant difference when compared to the sequence movements with and
without the ball.

Discussion/Conclusion
The pectoral major / deltoid and latissimus dorsi / deltoid were the only pairs of the muscles which presented significant
difference (p<0,05). Nevertheless in the comparison of the movements with the ball, all the muscles compared to the
latissimus dorsi presented significant difference. It is interesting to notice that the general average and the standard
deviation of de deltoid (medial portion), teres major and latissimus dorsi muscles were higher in the muscle sequential
movements executed without ball.
Key words: Electromyographic. Volleyball. Muscles.

References
[1]. Rokito, A.S. Et Al. Eletromyografic Analysis Of Shoulder Function During The Voleyball Serve And Spike. J
Shoulder Elbow Surg., Saint Louis, 1998. P.256-263.
[2]. Bankoff, A. D. P.; Fonseca Neto, D.R.; ZAGO, L.C. Electromyographic Study Of The Pectoralis Major
(Sternal Portion) And Deltoid (Medial Portion) Muscles In Volleyball Sequential Actions. In: Annual Congress
[3]. European College Of Sport Science. 8., 2003, Salzburg. Resumo Salzburg, 2003.
[4]. Enoka,R.M. Bases Neuromecânicas Da Cinesiologia. São Paulo: Manole, 2000. 237 P.

NOTA: O texto com a iconografia está no anexo

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