Article

OBJECTIVES: To investigate: (1) the passive and dynamic shoulder internal (IR)
and external (ER) rotation range of motion (ROM) of 2 groups of asymptomatic
overhead throwing athletes:
one group who had never experienced shoulder symptoms
and another who had shoulder symptoms >12 months ago, (2) the effect of taping on
the passive and dynamic IR-ER ROM in both these groups. DESIGN: A within-subject
repeated measures analysis of variance design to determine the differences in
passive and dynamic shoulder rotation range and the effect of shoulder taping on
the rotation range in a group of uninjured and previously injured overhead
throwing athletes. SETTING: Academic institution sports medicine setting.
PARTICIPANTS: Twenty-six overhead throwing collegiate athletes: 17 with no
history of shoulder injury and 9 with previous shoulder injury. METHODS: Passive
shoulder ROM was measured with a goniometer with the subject in the supine
position. To measure dynamic ROM, the subjects sat on a chair and threw a
handball into a net. An 8-camera Vicon Motion Capture system recorded markers
placed on the upper limb and trunk. Dynamic ROM was calculated with inverse
kinematics by using OpenSim. MAIN OUTCOME MEASUREMENT: Shoulder IR-ER ROM.
RESULTS: Dynamic IR-ER ROM was significantly greater than passive IR-ER ROM (P <
.0001). There was no difference in passive IR-ER ROM between the uninjured and
previously injured overhead throwing athletes. However, there was a significant
difference in the total dynamic IR-ER ROM, whereby the overhead throwing athletes
who had never experienced shoulder symptoms had less IR-ER ROM than the
previously injured group (173.9 degrees versus 196.9 degrees , respectively; P =
.049). Taping the shoulder increased the passive ROM in both groups of subjects
(P < .001), increased the dynamic IR-ER ROM in the uninjured subjects, but
decreased the dynamic IR-ER ROM in the previously injured subjects, although this
was not statistically significant (P = .07). CONCLUSIONS: Passive IR-ER ROM is a
poor indication of dynamic shoulder function. Athletes who have had a previous
shoulder injury demonstrate a greater dynamic IR-ER ROM than athletes who have
never had a shoulder injury. Shoulder taping decreased the dynamic range of the
previously injured athlete, so that it was nearer the dynamic range of the
uninjured athlete. Shoulder taping might provide increased protection for the
injured athlete by decreasing the dynamic IR-ER ROM and by facilitating better
shoulder and scapular muscle control. Further studies are necessary to
demonstrate whether this finding is clinically significant.
CI - Copyright A(c) 2012 American Academy of Physical Medicine and Rehabilitation.
Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS