The main objective of this study is to analyze the effectiveness of the lumbar nerve root stimulation with ultrasound-guided percutaneous electrolysis versus the electrical dry needling of trigger points in patients with chronic low back pain.
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Change from baseline in Algometry
Timeframe: At baseline, at 3 weeks, at 6 weeks, and 1 month after the last intervention.
Change from baseline in Roland Morris Disability Questionnaire (RMDQ).
Timeframe: At baseline, at 3 weeks, at 6 weeks, and 1 month after the last intervention.