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Aim: To clarify the optimal Transcutaneous Electrical Nerve Stimulation (TENS) frequency in managing pain and functional deficiency and the efficacy of low frequency (LF) and high frequency (HF) -TENS on pain and functional status in patients with knee osteoarthritis (OA). Material and Method: Ninety-three female patients with symptomatic knee OA were enrolled in this study. All the patients were randomly divided sham or LF or HF-TENS groups with five sessions/week of physical therapy as 20 minutes hot pack, 5 minutes therapeutic ultrasonography, and exercise program. Pain on the Visual Analog Scale (VAS) in rest and motion, durations of walk, climbing up and down stairs and pain, stiffness, function and total scores of Western Ontario and McMaster Universities osteoarthritis index (WOMAC) were assessed at baseline, after therapy and 4 weeks after the therapy. Results: The VAS pain in rest and motion were found to be significantly different for each therapy group within the three visits (

Which is the Appropriate Frequency of TENS in Managing Knee Osteoarthritis: High or Low Frequency?