TITLE

The Strengthening Effect of Electrical Stimulation on Lumbar Paraspinal Muscles in the Sitting Position: A Randomized Controlled Trial

AUTHOR(S)
Choi, Young-Ah; Lee, Shi-Uk
PUB. DATE
July 2017
SOURCE
PM & R: Journal of Injury, Function & Rehabilitation;Jul2017, Vol. 9 Issue 7, p643
SOURCE TYPE
Academic Journal
DOC. TYPE
journal article
ABSTRACT
Background: Sedentary lifestyle, a prevalent finding in modern society, can lead to weakness of the lumbar trunk musculature. Electrical stimulation (ES), in addition to lumbar strengthening exercises, has been shown to increase muscle strength.Objective: To assess the strengthening effect of ES on the lumbar paraspinal muscles during prolonged sitting.Design: Randomized, controlled, single-blind study.Setting: Tertiary hospital.Participants: Thirty healthy subjects without low back pain.Methods: Thirty participants were randomly assigned to the ES group (n = 15) or the control group (n = 15). ES was administered over the lumbar paraspinal muscles, while subjects maintained a seated posture, at a maximal tolerable intensity for 60 minutes per day, three times per week, for 4 consecutive weeks. An identical protocol was used in the control group with muscle stimulation provided at the minimal sensory threshold intensity.Main Outcome Measurements: The isokinetic strength of the lumbar paraspinal muscles was evaluated at baseline, 4 weeks after the initiation of ES, and 8 weeks after the initiation of ES with an isokinetic dynamometer (Biodex Medical Dynamometer System-4) at 60°/s and 120°/s angular velocities.Results: The extension and flexion peak torque at 60°/s showed no significant interaction between the time and intervention or between the interventions. However, after 4 weeks of ES in the sitting position, the isokinetic extensor trunk muscle strength measured at 120°/s angular velocity significantly increased in the ES group (P < .05) compared with that in the control group. This effect was not maintained when measured at 4 weeks after the cessation of ES.Conclusions: ES in a sitting position is a potentially effective and accessible rehabilitation treatment, which can lead to short-term improvement in the extensor trunk muscle strength of the lumbar paraspinal muscles.Level Of Evidence: I.
ACCESSION #
124212437

 

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