Article

Axial rotation of the trunk has been reported as a significant risk of low back
dysfunction. However, a lack of biomechanical investigation exists that explains
how twisting is accomplished with simultaneous asymmetric handling between the
hip joints and lumbar spine. We used a three-dimensional motion analysis to
measure movements of the bilateral hips and lumbar spine. Forty-four persons
participated in the study, and the results indicated that spinal range of motion
(ROM) was significantly different based on dominance (F = 198.83, p = 0.001),
region x dominance (F = 14.21, p = 0.001), and dominance x dimension (F = 141.08,
p = 0.001). We also found a three-way interaction between region x dominance x
dimension (F = 26.30, p = 0.001). These results indicated that the motion of the
transverse and sagittal planes significantly increased when the participants
attempted to rotate their hips, especially on the nondominant side. Decreased
axial trunk ROM on the side of dominance might stiffen passive structures of the
hip joints. The functions of the hip joints and lumbar spine might be altered
three dimensionally based on the side of dominance.

Langue : ANGLAIS