Objective: The purpose of this study was to compare the effects of trunk balance exercise and whole-body vibration (WBV) training on the muscle dimensions of patients with chronic nonspecific low back pain (cNLBP).
Methods: Fifty patients with cNLBP were randomly assigned to either the trunk balance (n = 25) or the WBV (n = 25) group. Both groups performed the training exercises 3 times a week for 6 weeks. The geometry of bilateral abdominal and lumbar multifidus muscles was measured before and after the interventions using diagnostic ultrasound.
Results: Both interventions increased the dimensions of the abdominal and multifidus muscles during rest and contraction (P ≤ .001). There was no significant difference between the groups (P ≥ .08). Cohen’s d, the between-group effect size, was ≤0.68.
Conclusion: In a 6-week period, WBV training was as effective as trunk balance exercises at improving the muscle geometry in patients with cNLBP
Author Keywords: Low Back Pain; Ultrasonography; Vibration
Clinical Trial: IRCT2016072229029N1. www. IRCT.ir
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