Does Humeral Retrotorsion And Rotational Range Of Motion Change With Experience Of Playing In Professional Volleyball Players?


Patryk Klaptocz, PhD
POLAND

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Does Humeral Retrotorsion And Rotational Range Of Motion Change With Experience Of Playing In Professional Volleyball Players?

Patryk Klaptocz, PhD, POLAND Hubert J. Laprus, MD, PhD, POLAND Adrian Błasiak, MD, PhD, POLAND Roman Brzóska, MD, PhD, POLAND Andrzej Grzegorzewski, Prof, POLAND

St Luke Hospital, Bielsko-Biala, Śląskie, POLAND

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Anatomic Location

Shoulder Glenohumeral

Patient Populations

Professional Athletes / Olympians Sport Specific Population

Anatomic Structure

Capsuloligamentous Complex

Diagnosis / Condition

Instability Stiff Joints

Diagnosis Method

Ultrasound

Sports Medicine

Basic Science Rehabilition / Physical Therapy Sport Specific Injuries Biomechanics

Summary: In professional volleyball players, the degree of retrotorsion is significantly greater on the dominant side and enhances with the increase of playing experience. Rotational range of motion also has been changing during athlete's career and depends on humeral torsion.

OBJECTIVES: Overhead athletes demonstrate adaptive changes in rotation motion of glenohumeral joint. They depend on adaptive changes in the soft tissue, but also on the degree of humeral retrotorsion. The aim of this study was to determine the extent how retrotorsion affects the range of rotation motion and how these parameters change with the duration of volleyball training.

Methods

It was a prospective cross-sectional study. Author have examined 99 professional male players, aged 13-41, who have been practicing volleyball for at least 2 years and not less than 5 times a week. The mean age of the subjects was 19.67, and the standard deviation SD = 6.9 years. The mean value of volleyball playing experience was 8.4 years, and standard deviation SD = 6.2 years. Humeral retrotorsion was measured using diagnostic ultrasound and Rippstein plurimeter, while the range of external rotation (ER) and internal rotation (IR) was measured by plurimeter. One-way analysis of variance for dependent variables was used to compare the mean of the tested parameters for left and right side. Univariate linear regression models was used to assess the dependence of the studied variables on the degree of humeral retrotorsion and playing experience. Student’s t-test was used for comparing regression coefficients in linear regression models.

Results

In all tested values a statistically significant difference was noticed between the dominant and non-dominant side (p<0.05). The range of IR motion and the total range of rotation motion (TROM) is significantly correlate with degree of retrotorsion (p<0,05). Humeral retrotorsion depends on the age of playing (p<0,05). Except IR measured in supine and TROM measure in side lying, all other parameters of the range of motion proved to be correlate with the experience of playing (p<0,05).

Conclusions

In professional volleyball players, the degree of retrotorsion is significantly greater on the dominant side and enhances with the increase of playing experience. On the dominant side, there is a significantly increased ER range and decreased IR and TROM range. With increasing retrotorsion, IR range in both limbs and TROM on the dominant side measured supine decreases. On the dominant side, ER and TROM range, measured supine decreases with the length of playing, whilst measured in side lying, ER range decreases and IR range increases.

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