Article

OBJECTIVE: To examine the transfer of energy through the pelvis and the lower
limb during sit-to-stand (STS) in low back pain (LBP) subjects with or without a
straight-leg raise sign. DESIGN: Cross-sectional. SETTING: Biomechanics
laboratory. PARTICIPANTS: Three groups, each of 20 subjects, participated. The
first group consisted of asymptomatic subjects, and the other 2 groups of
consisted of LBP subjects (duration between 7 days and 12 weeks) with and without
a straight-leg raise sign. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES:
The work done and the power of the pelvis, thigh, and leg segments during STS
were determined. RESULTS: Energy was transferred from the pelvis to the thigh
segment and then to the leg segment, and this was achieved mainly by passive
mechanisms. The power flow of the pelvis segment was significantly decreased in
subjects with LBP. Although the power of the lower-limb segments was decreased,
the total work done of these segments was increased. CONCLUSIONS: STS is a more
energy-demanding and less efficient task for subjects with LBP, either with or
without a positive straight-leg raise sign. Such increases in energy demand may
further exacerbate back pain, and treatment should be developed to restore a more
efficient energy transfer pattern.

Langue : ANGLAIS

Tiré à part : OUI