Article

Chronic low back pain (CLBP) is a multifactorial condition with a
variety of symptoms, one of which is abnormal gait.
The lumbar spine and its
musculature are important in controlling gait, and in CLBP the lumbar extensors
are often deconditioned. Because of this specific isolated lumbar extension,
exercise often is recommended. It was therefore of interest to examine its
effects of upon gait variability. OBJECTIVE: To examine the effects of isolated
lumbar extension resistance training on lumbar kinematic variability during gait
in participants with CLBP. DESIGN: Randomized controlled trial. SETTING:
University Health, Exercise and Sport Science Laboratory. PARTICIPANTS:
Twenty-four participants with nonspecific CLBP. INTERVENTIONS: Participants were
randomly allocated to a 12-week isolated lumbar extension exercise intervention
(1x/week performing a single set to momentary muscular failure using a load equal
to 80% max tested torque) or nontraining control period. MAIN OUTCOME MEASUREMENTS: Lumbar kinematics during gait, including angular displacement,
kinematic waveform pattern (CVp), and offset (CVo) variability, were examined via
3-dimensional analyses. RESULTS: No significant changes in displacement or CVo
were found as a result of the intervention; however, a small but significant
reduction in sagittal plane CVp
(-20.90 +/- 3.53%, effect size = 0.48, P = .044)
occurred, indicating improved motor pattern replication through this movement
plane. CONCLUSIONS: Considering the role of the lumbar extensors in gait, and
their common deconditioning in CLBP, an isolated lumbar extension resistance
exercise intervention may reduce gait variability. These results suggest isolated
lumbar extension exercise may specifically reduce sagittal plane variability,
indicating improved motor pattern replication through this movement plane,
perhaps attributable to the plane of movement used during the exercise.
CI - Copyright (c) 2016 American Academy of Physical Medicine and Rehabilitation.
Published by Elsevier Inc.
All rights reserved.

Langue : ANGLAIS