Does classical pulsed electromagnetic field (PEMF) therapy effectively treat patients with knee osteoarthritis?
J Rehabil Med · 2019 · PMID 31583420 · DOI 10.2340/16501977-2613
Pulsed electromagnetic field therapy may improve physical function in knee osteoarthritis but does not significantly reduce pain or stiffness.
The question
Does classical pulsed electromagnetic field (PEMF) therapy effectively treat patients with knee osteoarthritis?
What they tested
The study implicitly hypothesizes that classical PEMF therapy will improve outcomes such as pain, stiffness, and physical function in patients with knee osteoarthritis.
How they did it
A systematic review and meta-analysis were conducted by searching PubMed, EMBASE, Web of Science, and Cochrane Library. The review included randomized controlled trials (RCTs) that compared classical PEMF therapy with placebo in patients with knee osteoarthritis. Data on pain, stiffness, and physical function were extracted from 8 RCTs involving 421 patients.
What they found
PEMF therapy improved physical function (weighted mean difference [WMD] = -5.28, 95% confidence interval [CI] -9.45 to -1.11, p = 0.01). However, it showed no significant advantage in reducing Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) total score (WMD = -7.80, 95% CI -16.08 to 0.47, p = 0.06), WOMAC pain score (WMD = -1.06, 95% CI -2.30 to 0.17, p = 0.09), visual analogue scale pain score (WMD = -0.88, 95% CI -2.06 to 0.31, p = 0.15), or WOMAC stiffness score (WMD = -0.50, 95% CI -1.09 to 0.09, p = 0.1).
| Physical Function (WMD) | -5.28 | |
|---|---|---|
| WOMAC Total Score (WMD) | -7.8 | |
| WOMAC Pain Score (WMD) | -1.06 | |
| VAS Pain Score (WMD) | -0.88 | |
| WOMAC Stiffness Score (WMD) | -0.5 |
Weighted Mean Difference (WMD) values indicate the effect of PEMF therapy compared to placebo for various outcomes. Negative values generally suggest improvement.
What it means
Pulsed electromagnetic field therapy is beneficial for improving physical function in patients with knee osteoarthritis, but it does not show an advantage in treating pain and stiffness.
Limitations
Further randomized controlled trials are needed to confirm these findings and to determine the optimal parameters and treatment regimen for pulsed electromagnetic field therapy.
The paper at a glance
| Magellan’s evidence label | pulsed electromagnetic fields (our label for this citation — see PubMed for the paper’s own title and authors) |
|---|---|
| Journal | J Rehabil Med |
| Year | 2019 |
| PMID | 31583420 ↗ |
| DOI | 10.2340/16501977-2613 ↗ |
| Topic | Muscle, strength & physical function |
Read the source: PubMed record (authors, abstract, full citation) ↗ · Publisher via doi.org ↗
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PEMF Therapy Mat
For osteoarthritis, meta-analyses of randomized placebo-controlled trials report short-term reductions in joint pain and improvements in physical function—though effect sizes vary widely, some high-quality reviews find little or no advantage over placebo, and shorter sessions (30 minutes or less) appeared more…
Pulsed electromagnetic field (PEMF) therapy is a non-invasive modality in which a device—often a…
Research describes the compound or intervention studied. It is not a claim about any specific product.
Molecules & mechanisms in this paper
Each of these is named in the paper’s own words above. Open the monograph for the full mechanism and its other citations.
Cite this page
These citations point at this summary. To cite the original paper with its full author list, use the PubMed record or doi.org.
Magellan Longevity. (2026). Does classical pulsed electromagnetic field (PEMF) therapy effectively treat patients with knee osteoarthritis? [Plain-English summary of J Rehabil Med 2019, PMID 31583420, DOI 10.2340/16501977-2613]. Magellan Longevity. https://magellanlongevity.com/study/s160.html@misc{magellan_s160,
title = {Does classical pulsed electromagnetic field (PEMF) therapy effectively treat patients with knee osteoarthritis?},
author = {{Magellan Longevity}},
year = {2026},
howpublished = {\url{https://magellanlongevity.com/study/s160.html}},
note = {Plain-English summary of PubMed PMID 31583420; DOI 10.2340/16501977-2613; J Rehabil Med 2019. Reviewed by Gabriel Radu, DO},
urldate = {2026-08-11}
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