Vol.1, No 10, 2003 pp. 43 - 53
UDC 796.43.2 796.012
Scientific Paper
COMPARATIVE EMG ANALYSIS OF THE SHOULDER
BETWEEN RECREATIONAL ATHLETES AND JAVELIN THROWERS DURING ELEMENTARY ARM
MOTIONS AND DURING PITCHING
Árpád Illyés1, Rita M. Kiss2
1Semmelweis University, Department
of Orthopaedics 1113 Budapest, Karolina út 27.
2Hungarian Academy of Sciences, Research
Group of Structures
1111 Budapest, Bertalan L. u. 2.
E-mail: illyes_arpad@hotmail.com
Abstract. 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 pitching a ball 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 the elementary motion of upper extremities
and during pitching. Nine javelin throwers and sixteen recreational athletes
without shoulder problems were studied in the Biomechanical Laboratory
at the Budapest University of Technology and Economics. Signals were recorded
by surface electromyography from eight different muscles. The results obtained
from the muscles of upper extremities of throwers were compared with those
of recreational athletes. The better neuromuscular control of throwers
caused a more profitable muscle activity. Differences during the learned
motion are more significant. Muscles of the deltoideus of recreational
athletes show stronger activity then those of throwers. Muscles of the
rotator cuff of throwers show stronger activity. These data may provide
a basis for understanding improved performance and an adjunct for sports-specific
rehabilitation programs.
Key words: shoulder, electromyography, biomechanics, pitching.
KOMPARATIVNA EMG ANALIZA RAMENA
IZMEĐU SPORTISTA REKREATIVACA I BACAČA KOPLJA
TOKOM OSNOVNIH KRETANJA RUKE I TOKOM BACANJA
Problemi sa ramenima su časti kod bacačkih sportova. Iako postoji još toga
što se može naučiti, znanje o uzastopnoj mišićnoj akciji ramena se širi.
Dalje tumačenje mišićne aktivnosti vezane za ubacivanje lopte dozvoljava
specifičnije uslove da se poboljša izvođenje, smanje povrede, doprinese
rehabilitaciji u slučaju povrede. Cilj ove studije je da se uporedi mišićna
aktivnost sportista rekreativaca i bacača koplja tokom osnovnih kretanja
gornjih ekstremiteta i tokom bacanja. Devet bacača koplja i šesnaest sportista
rekreativaca bez problema sa ramenima bili su testirani u Biohemijskoj
laboratoriji Budimpeštanskog univerziteta Tehnologije i Ekonomije. Signali
su beleženi na površini elektromiograma od osam različitih mišića. Rezultati
dobijeni sa mišića gornjih ekstremiteta bacača upoređeni su sa sportistima
rekreativcima. Bolja neuromišićna kontrola bacača proizvela je korisniju
mišićnu aktivnost. Razlike tokom naučenih okvira kretanja su više značajne.
Mišić deltoideus sportista rekreativaca pokazuje veću aktivnost nego kod
bacača. Mišić rotator cuff kod bacača pokazuje jaču aktivnost. Ovi podaci
mogu omogućiti osnovu za razumevanje poboljšavanja izvođenja i dodatak
sportskim specifičnim rehabilitacionim programima.
Ključne reči: ramena, elektromiografija, biomehanika, bacanje.
