TECAR Therapy for Tendinopathy: What the Modality Actually Does

Quick answer. TECAR therapy — short for capacitive and resistive transfer of energy — is a tissue-deep radiofrequency modality used as an adjunct in tendinopathy rehab. It generates controlled heat and a low-grade bioelectric stimulus inside the tissue, which can reduce pain and improve short-term tissue tolerance to loading. The evidence is early and supportive, not headline. We use it at Medstar to help patients tolerate the heavy slow-resistance loading that does the actual remodelling work.

If your clinician has offered TECAR for an Achilles, patellar, gluteal, or proximal hamstring tendinopathy, this is the version of the conversation we have at the first visit.

What TECAR actually is

TECAR is a radiofrequency electrotherapy modality that delivers energy in the high-radiofrequency range — most clinical devices operate around 400 to 500 kHz, well below the megahertz range of medical diathermy. The device uses two operating modes:

• Capacitive mode targets softer, water-rich tissues. Energy concentrates in the more superficial layers — skin, subcutaneous fat, superficial muscle. We use capacitive mode for surface-level pain modulation and for mobilising the fascia overlying the tendon.
• Resistive mode targets denser, more electrically-resistant tissue — tendon, bone, deep myofascial junctions. The energy concentrates deeper in the tissue layers, which is where most of the tendinopathy work happens.

The practitioner moves a rounded metallic handpiece in slow circular patterns across the treatment area, with a conductive cream as the coupling agent. A grounding plate completes the circuit. The patient feels a deep, even warming sensation. A typical TECAR component of a session runs 10 to 15 minutes inside a 30 or 60-minute physiotherapy visit.

What it does to tendinopathic tissue

The proposed mechanisms, summarised in the European Journal of Translational Myology overview of capacitive and resistive electric transfer, include localised hyperaemia, an increase in tissue temperature that stays in a physiologically safe range, and a low-grade bioelectric stimulus that may influence cellular activity at the treatment site. None of those mechanisms are unique to TECAR — heat, increased circulation, and mechanical input can be produced by other means. What is different about TECAR is the combination delivered into deep tissue without surface heating that has to pass through skin first.

In tendinopathy specifically, the working clinical model is that TECAR temporarily reduces pain and improves tissue tolerance, which lets the patient complete the loading exercises that drive the actual tissue remodelling. The loading is the active ingredient. TECAR is the modulator that makes the loading possible at a useful intensity earlier in the rehab.

What the evidence supports — and what it doesn't

The TECAR evidence base in tendinopathy is real but smaller than the marketing materials suggest. A handful of randomised trials and a 2022 systematic review have evaluated capacitive and resistive electric transfer in lateral epicondylalgia, patellar tendinopathy, and Achilles tendinopathy.

The pattern that emerges from those studies is consistent. TECAR added to a competent active-rehab program produces short-term improvements in pain and function compared with exercise alone or sham. The added benefit tends to be most visible in the first four to six weeks. Long-term outcomes converge — by three to six months, the gap between TECAR-plus-exercise and exercise-alone narrows considerably.

What that means for the patient: TECAR can shorten the early painful window where loading feels intolerable. It does not produce a better tendon at the end of the rehab compared with what good loading alone can produce. The clinical value sits in the early weeks, not the endgame.

For a balanced sense of where loading sits in tendinopathy rehab, the Beyer et al. heavy slow resistance vs. eccentric training in Achilles tendinopathy trial is a useful anchor. Heavy slow-resistance training produced durable improvements in both symptoms and tendon structure at twelve months. Modalities are adjuncts to that work, not substitutes.

When TECAR earns its place in our plan

We use TECAR when the patient has a tendinopathy that meets a few criteria:

• The diagnosis is clear — load-related tendon pain reproduced on a standardised loading test (single-leg heel raise for Achilles, single-leg decline squat for patellar, hip abduction in side lying for gluteal).
• The symptoms are interfering with the patient's ability to complete the prescribed loading program at the intensity that produces change.
• The patient has been loading consistently for two weeks or more and the early painful window has not yet softened.
• Other adjuncts — taping, footwear adjustment, brief load deload — have not closed the gap.

Common cases at Medstar where TECAR shows up in the plan:

• North Shore trail runner with mid-portion Achilles tendinopathy who needs to keep loading to hold their season but cannot tolerate the planned calf raises without pain modulation.
• Rec basketball or volleyball player with patellar tendinopathy in the early weeks of a heavy slow-resistance program, where the deep tendon discomfort is making the loading sets feel disproportionate.
• Female runner with gluteal tendinopathy and lateral hip pain on side lying — TECAR is paired with hip-abduction loading and sleep position coaching.

When TECAR is not the right call

Several patterns push us toward other tools:

• Recalcitrant tendinopathy beyond six months of failed conservative care. The literature on shockwave is stronger in that population — we usually shift to shockwave or refer for orthopaedic consultation.
• Tendinopathy with a clear biomechanical driver that the patient has not addressed (wrong shoe, novel mileage spike, training error). The right move is to fix the input, not add a modality.
• Acute tendon rupture or partial-thickness tear with significant structural change on imaging. That is a different rehab pathway entirely.
• The contraindications listed in the FAQ above.

Where TECAR fits in the full tendinopathy plan

A realistic tendinopathy course in our clinic looks like this:

• Weeks 1–4. Heavy slow-resistance loading three days a week. Pain monitor on the next-morning symptom and the loading test response. TECAR twice a week if the loading is not yet tolerable. Education on the timeline.
• Weeks 5–8. Loading progresses. TECAR tapers to once a week, then drops out as the patient tolerates the loading without modality support. Reassessment against function.
• Weeks 9–12. Loading continues at higher intensity or moves toward sport-specific patterns. Modality use is rare in this phase.
• Beyond 12 weeks. If symptoms have not changed, the diagnosis and program are revisited. Imaging may enter the conversation through the family physician.

TECAR is a useful piece of equipment to have in a sports physiotherapy clinic. It is not magic. It is one of several tools that, in the right case, helps the patient finish the rehab they would otherwise be too sore to complete.

This article is general information about TECAR therapy and tendinopathy rehabilitation. It is not personal medical advice. A regulated practitioner can confirm whether the patterns described apply to you.

Sources

• Notarnicola et al. — review on capacitive and resistive electric transfer applications, European Journal of Translational Myology (2022)
• Beyer et al. — Heavy slow resistance vs. eccentric training in Achilles tendinopathy: a randomised controlled trial, American Journal of Sports Medicine (2015)
• BJSM consensus on Achilles tendinopathy management
• College of Physical Therapists of BC (CPTBC)