Biomedical Engineering Reference
In-Depth Information
the arm at a side. While testing we hoped that when raising the arm to the elevated
position (arm at 90
ı
flexion and abduction) the zero stayed the same, we didn't
expect to have any complementary rotation, and it happened that way. So the main
reason to find more external rotation at non-throwers is possibly the fact that we
were evaluating active motion and not passive one.
Knowledge of joint ROM and speeds of movement along with joint forces and
moments will provide a scientific basis for improved and rehabilitative protocols for
throwers.
5
Conclusions
Speed was not an interaction factor between groups. At the end-range of arm
external rotation the volleyball players group showed a scapula more in retraction
and in posterior tilt (acromion backwards). No such correlation was found in the
control group or the handball players, possibly due to sports adaptation.
This group also showed less amplitude of external rotation in active motion.
As a limitation of this study we would include possible skin artifacts, especially
at the arm sensor. To avoid this situation we used a sensor mounted on a cuff tiny
adjusted to the arm just below the deltoid attachment, trying to ensure the position
of the sensor towards the skin.
Acknowledgments
The authors would like to thank to Vitoria Sport Club Guimaraes, Portugal
for allowing using their facilities and athletes and Pedro Miguel Ribeiro for all support on data
collection.
References
1. Braun S, Kokmeyer D, Millett PJ (2009) Shoulder injuries in the throwing athlete. J Bone Joint
Surg Am 91(4):966-978
2. Lee S-B, Kim K-J, O´Driscoll SW, MOrrey BF, An K-N (2000) Dynamic glenohumeral
stability provided by the rotator cuff muscles in the mid-range and end-range of motion: a
study in cadavera. J Bone Joint Surg Am 82
3. Matsen FA, Chebli C, Lippitt S (2006) Principles for the evaluation and management of
shoulder instability. J Bone Joint Surg 88:647-659
4. Veeger HEJ, van der Helm FCT (2007) Shoulder function: the perfect compromise between
mobility and stability. J Biomech 40(10):2119-2129
5. Gomes RRTaJLE (2009) Measurement of glenohumeral internal rotation in asymptomatic
tennis players and swimmers. Am J Sports Med 37:1017-1023
6. Schwab LM, Blanch P (2009) Humeral torsion and passive shoulder range in elite volleyball
players. Phys Ther Sport 10(2):51-56
7. Murachovsky J, Ikemoto RY, Nascimento L, Bueno R, Coelho J, Kome¸u M, Wilson P (2007)
Avalia¸ ao da retroversao da cabe¸a do umero em jogadores de handebol. Acta Ortop Bras
15(5):258-261
