TECAR therapy: it is one of the instrumental therapies most often offered in Italian physiotherapy practices, and also one of those about which the least precise things are said. The acronym stands for Capacitive Resistive Electric Transfer: a long-wave radiofrequency that passes through the tissues and warms them from the inside, instead of warming them from the outside as a hot water bottle would.
This guide explains the mechanism, how a session unfolds, when it is contraindicated and, above all, what the literature really says about its effectiveness. We anticipate the uncomfortable part, because it is the one you need in order to decide: the physical effects on the tissues are measured and real, but the evidence that this translates into a clinical benefit superior to other treatments is weak. This is not a reason to throw the subject out. It is a reason to understand where to place it in your pathway and how much to spend on it.
⚠ Important: read this before continuing
The exercises and advice in this article are general guidance and may not suit your situation. Every person has a unique clinical history: what works for others could be counterproductive for you.
Want a professional's opinion? Start with the questionnaire: you register and see who will follow you, a physiotherapist registered with the Albo, chosen for your case, whom you write to in chat. If you would rather hear their voice, the first consultation is free and we look at your situation together.
Before starting a course: the signs not to ignore
TECAR therapy is heat. Heat applied to an undiagnosed problem can mask the symptom and delay the real diagnosis, and in some situations it is actively contraindicated. Before booking a course, see a doctor if you recognise any of these situations:
- Swelling, warmth and pain in one calf or one leg, perhaps after a long journey, an immobilisation or a surgical operation: a deep vein thrombosis must be ruled out before applying any therapy that increases local flow.
- Fever, spreading redness, hot and tight skin: these may indicate an ongoing infection, which must not be heated.
- Night pain that does not pass when you change position, unexplained weight loss, marked tiredness, or a previous history of cancer.
- A major trauma with inability to bear weight or to move the limb: a fracture must first be ruled out.
- Loss of strength, persistent tingling or areas of skin that do not feel heat and cold properly: if you cannot correctly sense temperature, you cannot tell the therapist when the session is heating up too much, and this is how burns happen.
- Anyone with a pacemaker or other implanted electronic devices: TECAR therapy is not given to you, full stop.
Outside these cases, a musculoskeletal pain that has lasted a few weeks still deserves an assessment before therapies: knowing what you are treating changes everything else.
What the research really says
Let us start with the question that matters, because everything else depends on it.
The largest systematic review with meta-analysis on the topic examined electromagnetic diathermy therapies (shortwave, microwave and capacitive and resistive electric transfer) in musculoskeletal disorders. The authors sifted through 13.323 records and included 68 studies. The result: most of the pooled analyses showed no significant improvement in the main outcomes, that is pain, function and quality of life. Several studies taken individually show positive results, but for all the comparisons considered the quality of evidence according to the GRADE system was low to very low. The conclusion of the authors is clear: the results do not support the adoption of diathermy in the clinical setting, and treatments backed by evidence should be preferred.
A systematic review dedicated specifically to capacitive and resistive electric transfer has a more favourable tone, but its numbers explain why it must be read with caution: out of 276 articles retrieved, 13 were included, mostly on spinal disorders and knee osteoarthritis. Nine of the thirteen studies (70%) were randomised controlled trials, but only two had a low risk of bias according to the Cochrane assessment tool. The authors conclude that TECAR therapy seems effective in reducing pain and improving disability and quality of life, and at the same time that further research is needed to standardise protocols across the different orthopaedic conditions. In plain terms: the signal is there, the certainty is not, and there is not even a shared protocol for how many sessions to do and how.
A third review, focused on application in physiotherapy practice and sport, included 30 articles with an average methodological quality judged "good/fair" on the PEDro scale. Here too the nature of the available studies did not allow a quantitative analysis. What this review documents clearly are the physiological effects: increase in skin temperature, increase in blood perfusion of skin and muscle, increase in oxyhaemoglobin.
And here is the honest point of the whole matter. That TECAR therapy warms the tissues and increases local blood flow is measured. That this produces faster healing or a better result months later is not. These are two different claims, and industry marketing treats them as if they were the same thing.
The most recent controlled studies help to understand the order of magnitude. A single-blind randomised study of 60 patients with adhesive capsulitis of the shoulder (30 per group) added six TECAR sessions, three a week for two weeks, to a programme that both groups carried out: individually tailored therapeutic exercise, a hot pack for 30 minutes and transcutaneous electrical nerve stimulation. Both groups improved significantly in pain and disability at one and three months; the TECAR group showed greater improvements. On the ultrasound measures the picture is mixed and must be reported in full: the effusion of the long head of the biceps decreased significantly in both groups, while the thickness of the supraspinatus tendon did not change significantly. The authors conclude that adding TECAR to conventional treatment offered an additional benefit on pain and function, and this should be reported for accuracy; but the documented benefit concerns symptoms, while nothing moved in the tendon structure.
Another study, this time with a sham control group (that is, a fake device), involved 22 male professional athletes, mean age 21, with chronic adductor-related groin pain: 11 received ten real sessions and 11 simulated sessions, with both groups doing stretching exercises. The treated group reduced pain with large effect sizes, maintained at one month. But among the secondary outcomes only hip adduction range of motion improved significantly, and only at the one-month follow-up: strength and the functional questionnaire did not. And twenty-two male athletes aged around twenty are a narrow base for generalising to anyone else.
The overall picture, then, is this: encouraging results in small samples, which however do not hold up when they are pooled together in a meta-analysis. It is exactly the profile of a treatment that might work a little, for some people, in addition to something else, not of a cure.
An important tip: before trying these exercises, make sure you have received a correct diagnosis. People often think they have one problem, but the real cause of the pain is something else. Doing the wrong exercises can make the situation worse instead of better.
How it works: the physical mechanism
Radiofrequency. The device generates an oscillating electric field at long-wave radiofrequency, of about 0,5 MHz. In the review dedicated to capacitive and resistive transfer, over 75% of the thirteen included studies used frequencies between 440 and 600 kHz.
Endogenous heat. The field sets the ions present in the tissues in motion; this movement produces heat inside the tissue, not transmitted from the surface. This is why one speaks of diathermy, that is, "heat through".
Closed circuit. The system consists of a neutral return plate, placed on another part of the body, and two types of electrode that transfer the energy in capacitive or resistive mode.
Capacitive effect. The electrode coated with insulating material concentrates the energy in the superficial, water-rich soft tissues: muscle, fat tissue, vessels, the lymphatic system.
Resistive effect. The uncoated electrode lets the energy pass deeper, towards dense, poorly conductive tissues: tendons, bones, cartilage, joint capsules.
Biostimulation. This is the term with which the field describes the set of expected effects: increase in cellular metabolism, of repair processes, of drainage. It is the least solid part of the discussion: the increase in temperature and perfusion is documented, the chain that leads from there to faster tissue repair is a reasonable hypothesis, not a finding.
What really changes in the tissues
Vasodilation and perfusion. The best-documented effect: the reviews report a measurable increase in skin and muscle blood perfusion and in oxyhaemoglobin during and after application.
Short-term analgesia. Heat has a known pain-relieving effect, both directly and through the stimulation of skin receptors. This is why many people leave the first session saying they feel better. It is a real effect and it is also a transient one: it must not be confused with healing of the underlying problem.
Muscle relaxation. A muscle warmed by TECAR therapy is more tolerant of movement. This makes the session useful above all as a preparation for what comes after.
Drainage. The increase in local flow is the rationale for offering TECAR therapy for oedema and effusions. It remains a physiological rationale, not a robustly demonstrated outcome.
Tissue repair. Here one must be clear: the idea that radiofrequency accelerates collagen synthesis and healing of lesions is a widespread theoretical explanation, not a result confirmed in clinical studies in humans. In the capsulitis study, for example, the symptoms improved but the tendon thickness measured on ultrasound did not change.
The conditions for which it is offered
In the available reviews the most studied applications are spinal disorders and knee osteoarthritis. In published studies TECAR therapy appears in these contexts:
Tendinopathies. Achilles, patellar, rotator cuff, epicondylitis. It must be said that for patellar tendinopathy the strategy with the best evidence is a different one: a systematic review that included 12 of 136 articles shows that a treatment based on therapeutic exercise and load management significantly improves function, pain and strength, with positive results in the short and medium term. For accuracy: all twelve included studies were judged to be at moderate risk of bias, so here too the evidence is better, but not definitive. Instrumental therapy, if anything, accompanies that pathway.
Muscle injuries. Contractures, strains, the aftermath of tears: this is the most common use in sport, where it serves above all to make the return to active work tolerable.
Osteoarthritis. Knee, hip, shoulder, hand. It is among the most studied conditions, and it falls within those pooled in the meta-analysis on diathermy, which in most of the pooled analyses found no significant differences. Be careful, however, in how the figure is read: that verdict is an overall one across all the conditions treated, not a result published separately for knee osteoarthritis.
Low back pain. Chronic non-specific low back pain appears in several studies on TECAR therapy, but it is also the condition in which the risk of mistaking a spontaneous improvement for an effect of the treatment is highest.
Neck pain. Pain in the neck and tension in the neck and shoulders, often combined with manual therapy.
Sports injuries. Sprains and contusions, typically to manage pain and swelling in the early phases.
Post-operative rehabilitation. Used to control oedema and pain, always as a component of a broader programme and on the surgeon's indication.
What a session is like
Conductive cream. It is applied to the area to be treated: it serves to let the energy pass and to let the handpiece glide over the skin.
Moving handpiece. The physiotherapist moves the electrode, capacitive or resistive, over the area, often performing manual manoeuvres at the same time. In most published protocols it is a dynamic application, carried out by the operator: it is not a machine left resting on you by itself.
Return plate. A metal plate placed on another area of the body closes the circuit.
What you feel. A sensation of diffuse warmth, generally pleasant. The intensity should be adjusted according to your perception: if it becomes too hot you must say so straight away, because your signal is what prevents a burn.
Duration and number of sessions. There is no standard: the reviews point out the lack of shared protocols as one of the main limits of TECAR therapy. Recent controlled studies range from six sessions spread over two weeks to ten sessions in total. The duration of a single application, on the other hand, is not reported uniformly: it is one of the aspects the reviews ask to be standardised, so have it explained by your physiotherapist rather than taking it for granted.
Capacitive and resistive: what really changes
Capacitive. Insulated electrode, energy concentrated at the surface. It is chosen for muscle, fat tissue, oedema, vascular problems.
Resistive. Bare electrode, energy reaching the deep structures. It is chosen for tendons, joints, osteoarticular structures.
Combination. In practice the two modes are often alternated in the same session.
On whether a certain sequence or a certain proportion between the two modes produces better results than another, however, there is insufficient evidence: the standardisation of protocols is indicated by the reviews as an open problem. If you are shown a very detailed scheme presented as "the" correct protocol, know that it is the clinical experience of the operator, not a finding from the literature.
Contraindications
These are the least negotiable part of the article.
Pacemakers and implanted devices. TECAR therapy is contraindicated in anyone wearing a pacemaker, a defibrillator or other implanted electronic devices.
Pregnancy. It must not be applied to the abdomen.
Neoplasms. Contraindicated in the presence of tumours in the area to be treated.
Acute infections. It is not applied over an infection in the active phase.
Deep vein thrombosis. Contraindicated.
Altered sensation. You need to perceive heat correctly: it is the only real safety system against burns.
To these are added common sense on damaged skin, recently operated areas without the surgeon's go-ahead and the presence of metal fixation devices, on which your GP should be consulted.
Real advantages and limits
Non-invasive. TECAR therapy requires no needles, drugs or invasive procedures. It is a concrete advantage over injection-based alternatives.
Well tolerated. The sensation is of heat, not pain, and in the available studies intolerance to the treatment does not emerge as an issue. It must be said, however, that adverse events are reported in this literature in an unsystematic way: the absence of reports is not the same as proof of safety.
Side effects. "No side effects" is a simplification: the main risk, burns, exists and depends on how the intensity is regulated and on the person's sensitivity. Used correctly the risk is low; it is not, however, "impossible to do harm".
Quick relief. Many people feel better right after the session. This is consistent with the documented thermal effects, and it is by definition short-term.
The real limit. It is not safety, it is the relationship between what it costs and what it adds. If TECAR therapy takes the place of exercise in your pathway, you are spending on the part with less evidence instead of the part with more.
Compared with other therapies
Shortwave and microwave. These are the other two forms of diathermy, and in the meta-analysis they fall into the same analysis as TECAR therapy: shortwave, microwave and capacitive-resistive transfer share the same verdict of insufficient evidence. There is not much point in asking which of the three is "the best".
Ultrasound and laser. They have different mechanisms still and do not fall within that review: we have no direct comparison to cite here, so we do not invent one. What is known about ultrasound on its own, from the Cochrane review on the back, the meta-analysis on the knee and the umbrella review on the shoulder, is in ultrasound in physiotherapy.
Shockwave therapy. A completely different mechanism, non-thermal, and a profile of indications of its own, typically chronic tendinopathies and calcifications. They are not interchangeable with TECAR therapy.
Traditional heat. A hot pack warms from the outside, radiofrequency from the inside and more deeply. It is a documented physical difference. Whether it translates into a relevant clinical difference is, again, what is missing. It is worth remembering that in the adhesive capsulitis study both groups received the hot pack, and both improved significantly.
How to use this information anyway
Knowing that the evidence is weak does not mean refusing a session that has been proposed to you. It means using it better.
Treat it as a window, not a cure. The moment when the tissue is warm, less painful and more tolerant of movement is the right moment to work: mobility, manual therapy, exercise. If the session ends when you switch off the device, you have bought half an hour of relief.
Set a limit at the start. Agree with the physiotherapist on a short course and a criterion for checking: if after a few sessions nothing measurable has changed (how far you walk, how well you sleep, how much load you tolerate), do not continue out of inertia.
Be wary of promises. No instrumental therapy "eliminates" a chronic inflammation or "repairs" a tendon in five sessions. If you hear that promised, the problem is not the machine, it is whoever is selling it to you.
Do not give up the active part. For patellar tendinopathy, the only case documented in this article with a dedicated review, the component with the best evidence is graded exercise with load management. TECAR therapy can make that part easier to carry out, not replace it.
Ask for the diagnosis, not the machine. The most concrete risk is not that TECAR therapy will hurt you: it is that you spend weeks and money while nobody has yet understood why it hurts.
Costs: how to assess the spend
In the price lists of Italian private practices a single session generally falls between 30 and 60 euros, and a typical course multiplies that figure by the number of sessions planned. It is an indicative market figure, not a clinical one: ask for it before you start, together with the number of sessions proposed.
In the Italian National Health Service (SSN) this type of instrumental therapy is generally not available, so the spending is almost always private. And that is precisely why it is worth asking the cost-benefit question: for the same budget, a guided exercise pathway has better evidence behind it.
Frequently asked questions
Does it hurt? No. You feel warmth. If it becomes too hot, tell the physiotherapist straight away, who adjusts the intensity: your perception is what protects you.
How many sessions are needed? There is no standard number, and this is a recognised limit of TECAR therapy. Studies range from six to ten sessions. It is better to agree a short course and check the results.
Are the results immediate? Relief can be there from the first session, and it is the thermal effect. Lasting improvement, when it comes, depends on the rest of the pathway.
Can it be done every day? In the published protocols the typical frequency is a few sessions a week, not daily.
Can I have it if I have a pacemaker? No. It is an absolute contraindication.
Does it need a prescription? No, but it does need an assessment: without knowing what you are treating, any therapy is a blind attempt.
TECAR therapy and telerehabilitation
TECAR therapy requires the physical presence of the physiotherapist and of the equipment: it cannot be done at a distance, and anyone who said otherwise would be telling you a fairy tale.
What can be done at a distance is, as it happens, precisely the part that holds up best in the reviews: assessment, guided therapeutic exercise, load progression, education about the problem. With Ri-Hub you access qualified physiotherapists for this part of the pathway, at 29,90 euros per session. If you are already doing a course of TECAR therapy in a clinic, telerehabilitation is a way of not leaving the active part empty.
In summary
TECAR therapy is a non-invasive instrumental therapy, generally well tolerated, with the caveat that adverse events are poorly reported in this literature and that the risk of burns must be managed, and with physical effects on the tissues that are measured and real: it warms deeply and increases local perfusion. What it lacks is demonstration that these effects translate into a solid clinical benefit: the largest meta-analysis on diathermy, covering 68 studies, found no significant differences in most of the pooled analyses, with evidence of low to very low quality.
Put practically: it may help you feel better for a while and move more easily, and that window can be used well. It is not the main lever of your recovery. If you are considering a course, do it within a plan that has a clear diagnosis, a verifiable goal and an active part, and agree its duration before starting, not afterwards.
If you are comparing instrumental therapies, the same analysis on magnetotherapy is in Magnetotherapy: what it is for and what the studies really say.
For the comparison with the other light-based instrumental therapy, read Laser therapy: how it works and how much is really needed.
How widespread it really is, and how much it weighs in the work of those who have it: the machines in physiotherapy, who really has them.
Sources
- The Efficacy of Electromagnetic Diathermy for the Treatment of Musculoskeletal Disorders: A Systematic Review with Meta-Analysis. Journal of Clinical Medicine, 2023
- Capacitive and resistive electric transfer therapy in rehabilitation: a systematic review. International Journal of Rehabilitation Research, 2020
- Application of Capacitive-Resistive Electric Transfer in Physiotherapeutic Clinical Practice and Sports. International Journal of Environmental Research and Public Health, 2021
- Impact of TECAR therapy on pain and function in adhesive capsulitis: a randomized controlled trial. Lasers in Medical Science, 2025
- The effects of TECAR therapy on pain, range of motion, strength and subscale of HAGOS questionnaire in athletes with chronic adductor related groin pain: a randomized controlled trial. BMC Musculoskeletal Disorders, 2025
- Management of Patellar Tendinopathy Through Monitoring, Load Control, and Therapeutic Exercise: A Systematic Review. Journal of Sport Rehabilitation, 2022
Ultima verifica delle fonti: agosto 2026.
You might also be interested in:
Back Pain in Pregnancy: Safe Exercises and Remedies for Each Trimester
Shoulder Pain When Raising the Arm: Causes and How to Resolve It
Crural Neuralgia: Symptoms, Causes and Complete Recovery Pathway
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