This page summarizes published research on pulsed electromagnetic fields, or PEMF, in lateral epicondylitis, commonly called tennis elbow. It is for reference and does not state what any device will do for a reader with this condition.
PEMF Tennis Elbow: What researchers have studied
Lateral epicondylitis is a diagnosis used for pain and tendon-related symptoms at the outside of the elbow. The PEMF literature for this diagnosis is relatively small. It includes older randomized comparisons of active and inactive field exposure, one later randomized trial that also compared an injection, and a trial in which PEMF plus exercises was compared with microcurrent plus exercises and exercises alone. It also includes two systematic reviews that assessed the wider conservative-treatment or electrophysical-modality literature for lateral epicondylitis.
These studies do not describe one uniform intervention. Their comparators, outcomes, timing, and accompanying care differ. Some measured pain during specific movements, some included pressure-pain threshold or grip strength, and some used disability questionnaires. One trial evaluated people at three weeks and three months; another continued exposure for at least eight weeks. Those differences matter when reading results across the set.
This page stays with studies that enrolled people with lateral epicondylitis or lateral epicondylopathy. It does not generalize from other tendon locations, surgical healing, or animal tendon models. For research that covers tendon conditions more broadly, see tendonitis and PEMF research.
The studies
Dingemanse et al. 2014 systematic review
Dingemanse and colleagues searched for randomized trials and systematic reviews of electrophysical modalities for medial and lateral epicondylitis. Their final set contained two reviews and 20 randomized trials, all concerning lateral epicondylitis. The modalities included pulsed electromagnetic field therapy alongside ultrasound, laser, electrotherapy, shock wave therapy, and transcutaneous electrical nerve stimulation.
The review found moderate evidence for selected ultrasound and laser comparisons. For the other modalities, including PEMF, the authors described limited or conflicting evidence, or evidence of no difference. This is an important null-or-mixed finding because the review did not identify a consistent PEMF result across the lateral-elbow literature.
The review was broad rather than a pooled PEMF-only analysis. It combined modalities with different settings and compared trials with different outcomes and follow-up periods. It also cannot resolve whether later studies or a particular device format would produce the same pattern.
Dingemanse R, Randsdorp M, Koes BW, Huisstede BMA. “Evidence for the effectiveness of electrophysical modalities for treatment of medial and lateral epicondylitis: a systematic review.” British Journal of Sports Medicine. 2014;48(12):957-965. PMID: 23335238. DOI: 10.1136/bjsports-2012-091513.
Trudel et al. 2004 systematic review
Trudel and colleagues reviewed conservative rehabilitation research for lateral epicondylitis published from 1983 through 2003. Of 209 studies located, 31 met their inclusion criteria. Five reviewers used a structured appraisal tool, and the authors based treatment recommendations on their ratings and a level-of-evidence approach.
For PEMF, the review reported at least level 2b evidence of ineffectiveness. That conclusion reflects the evidence available to the review at the time, including an older controlled trial. It is a clear counterweight to later individual-study results that reported differences on some pain outcomes.
The review assessed many conservative treatments, not PEMF alone, and it predates later trials. Its evidence grading depends on the available studies and their reporting. It does not provide a direct comparison of current device specifications, nor does it establish a result for an individual reader.
Trudel D, Duley J, Zastrow I, Kerr EW, Davidson R, MacDermid JC. “Rehabilitation for patients with lateral epicondylitis: a systematic review.” Journal of Hand Therapy. 2004;17(2):243-266. PMID: 15162109. DOI: 10.1197/j.jht.2004.02.011.
Devereaux, Hazleman, and Thomas 1985
This double-blind randomized controlled trial enrolled 30 people with clinical and thermographic evidence of tennis elbow. Participants were allocated to active or inactive PEMF. The investigators continued the study exposure for a minimum of eight weeks.
At that point, the authors reported no statistically significant difference between the active and inactive groups. This is the most direct null trial in the record. It is especially relevant because its comparator was inactive PEMF rather than another active treatment.
The sample was small, and the PubMed abstract does not provide the group-level outcome values, confidence intervals, or longer-term results. Thermographic and clinical entry criteria also do not show how closely participants resemble every person given a lateral epicondylitis diagnosis today.
Devereaux MD, Hazleman BL, Thomas PP. “Chronic lateral humeral epicondylitis—a double-blind controlled assessment of pulsed electromagnetic field therapy.” Clinical and Experimental Rheumatology. 1985;3(4):333-336. PMID: 4085165.
Uzunca, Birtane, and Ta?tekin 2007
Uzunca and colleagues randomly assigned 60 people with lateral epicondylitis in equal numbers to PEMF, sham PEMF, or a corticosteroid plus anesthetic injection. They recorded visual analogue pain scores at rest, during activity, at night, with resisted wrist dorsiflexion, and with forearm supination. They also measured elbow pain threshold. Assessments occurred before the intervention, at three weeks, and at three months.
At three weeks, the injection group had lower activity pain and lower pain with resisted wrist dorsiflexion than the PEMF group. At three months, the authors reported lower rest, activity, and nighttime pain in the PEMF group than in the injection group. The abstract also states that PEMF appeared better than sham for lateral epicondylitis pain. These are study-reported findings, not a conclusion about any other device or person.
The trial was single-blind, had 20 participants per group, and followed participants for only three months. Its abstract does not provide enough detail to compare all outcome sizes across groups or determine whether results persist. The three-way design also makes one summary result insufficient to characterize every comparison.
Uzunca K, Birtane M, Ta?tekin N. “Effectiveness of pulsed electromagnetic field therapy in lateral epicondylitis.” Clinical Rheumatology. 2007;26(1):69-74. PMID: 16633709. DOI: 10.1007/s10067-006-0247-9.
Ammar 2016
Ammar conducted a randomized trial in 84 people with lateral epicondylopathy. Participants were assigned in equal groups to PEMF plus exercises, microcurrent electrical nerve stimulation plus exercises, or exercises alone. The study measured pain intensity, disability using the Disabilities of the Arm, Shoulder and Hand questionnaire, and hand-dynamometer grip strength over four weeks.
The abstract reports that all groups improved on the measured variables and that the PEMF-plus-exercise group had the largest reported effects. The authors characterized PEMF plus exercises as potentially more effective than microcurrent plus exercises. Because the active PEMF group also exercised, that result does not isolate the contribution of PEMF from the contribution of the combined program.
There was no inactive-PEMF comparison in the reported design, and the observation period was short. The abstract does not give complete numerical between-group results or longer-term follow-up. Its findings therefore add a direct lateral-elbow comparison, but they do not remove the uncertainty created by the older null trial and the systematic reviews.
Ammar TAR. “Pulsed electromagnetic field versus microcurrent electrical nerve stimulation in patients with lateral epicondylopathy.” International Journal of Therapy and Rehabilitation. 2016;23(11):519-523. DOI: 10.12968/ijtr.2016.23.11.519.
How strong is this evidence?
The evidence specific to lateral epicondylitis is limited and mixed. Its strongest feature is diagnostic relevance. The primary trials enrolled people with tennis elbow or lateral epicondylopathy rather than people with an unrelated tendon condition. However, they are few, small, and materially different in their comparisons. The Devereaux trial found no statistically significant active-versus-inactive difference. Uzunca and colleagues reported differences across sham and injection comparisons at different time points. Ammar’s trial reported larger improvements in a combined PEMF-and-exercise group, but it did not include sham PEMF and cannot separate the role of the exercises.
The systematic reviews do not create a uniform conclusion. Trudel et al. judged the earlier PEMF evidence ineffective at the evidence level they reported. Dingemanse et al. found limited or conflicting evidence, or no difference, for modalities other than the selected ultrasound and laser comparisons. The latter review includes PEMF in a broad modality synthesis rather than a dedicated meta-analysis of matched PEMF trials.
Important limitations include samples of 30, 60, and 84 people; short observation periods; different outcome measures; and inconsistent comparators. The studies also used different field exposures and did not establish equivalence between devices. Some results are reported mainly in abstracts, with incomplete numerical detail for effect size and uncertainty. These features make it reasonable to describe the named findings carefully, but not to make a broad claim about what a PEMF device will do for a person with tennis elbow.
What this means if you are considering a PEMF device
Start with the difference between research relevance and product equivalence. The studies above concern a localized outer-elbow diagnosis and study-specific equipment. They do not establish that one unit, output setting, or applicator has the same characteristics as another. Ask for the underlying study rather than relying on a condition list or a general reference to electromagnetic fields.
For a localized outer-elbow area, a portable applicator is a format comparison only. It is not evidence of equivalence to the study equipment and is not a recommendation. A full-body mat and a localized applicator differ in form factor and intended placement concept, but that distinction does not determine a research outcome. Background on device formats is available in PEMF mats compared with PEMF machines.
It can also help to separate evidence for lateral epicondylitis from broader claims about tendon conditions. Written product information should identify the applicator, controls, output information, documentation, warranty, and return terms. For general context on the field and evidence terminology, see PEMF science.
Questions to ask before buying
- Does the seller provide the waveform, frequency range, field-strength information, and applicator dimensions in writing?
- Which exact lateral epicondylitis study is being cited, and does the seller distinguish it from broader tendon research?
- What accessories, controls, power supply, carrying options, and written instructions are included in the listed price?
- What are the written return window, warranty length, repair process, and any restocking fees?
- Is contraindication information available in the documentation before purchase?
This page summarizes published research for reference. It is not medical advice, and nothing here is a claim that any PEMF device treats, cures, or prevents any condition. PEMF is not appropriate for everyone — review PEMF contraindications and talk with your own physician before beginning any new therapy, particularly if you have an implanted electronic device, are pregnant, or are being treated for a serious medical condition.