Article

The purpose of this study was to compare the kinematics of the shoulder and
pelvis based on range of motion (ROM), angular velocity, and relative phase (RP)
values during trunk axial rotation. Nineteen subjects with recurrent low back
pain (LBP) and 19 age-matched control subjects who are all right limb dominant
participated in this study. All participants were asked to perform axial trunk
rotation activities at a self-selected speed to the end of maximum range in a
standing position. The outcome measures included ROM, angular velocity, and RP on
the shoulder and pelvis in the transverse plane and were analyzed based on the
demographic characteristics between groups. The LBP group demonstrated decreased
ROM (p=0.02) and angular velocity (p=0.02) for the pelvis; however, there was no
group difference for the shoulder girdle. The ROM difference between the shoulder
and pelvic transverse planes had a significant interaction with age (F=14.75,
p=0.001). The LBP group demonstrated a higher negative correlation between the
shoulder (r=-0.74, p=0.001) and pelvis (r=-0.72, p=0.001) as age increased while
no significant correlations were found in the control group. The results of this
study indicated that there was a difference in pelvic rotation in the transverse
plane between groups during axial trunk rotation. It would be important to
coordinate postural stability between the shoulder and pelvic girdles during
ambulation; however, the pattern of trunk movement decreased with age due to
possible pelvic stiffness in subjects with recurrent LBP. Therefore, improved
pelvic flexibility for coordinated trunk movement patterns would help subjects
with recurrent LBP.
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Langue : ANGLAIS