What is physiotherapy – and why is it not the same as physical therapy?
Let’s start with the most common misunderstanding, because understanding the whole field depends on it. Physiotherapy is the broad medical field that includes every treatment which supports healing through a physical effect – movement, touch, water, air, heat, light or electricity – without medication or surgery. This large family includes therapeutic exercise, therapeutic massage, spa treatments, cave and salt therapy, as well as device-based treatments.
Physical therapy is a smaller group within this large family: it refers to treatments where the physical effect is produced by a device – in the form of electrical current, light, a magnetic field, ultrasound or compressed air. So when I mention TENS, soft laser or magnetotherapy, I’m talking about physical therapy – one branch of physiotherapy, not the whole of it.
In this article, I’ll introduce the branches of physiotherapy, then explain the device-based branch in detail – the one you can also use at home – and provide further detailed guidance for each method.
Key point
Physiotherapy = a family of treatments based on physical effects (movement, massage, water, air, heat and device-based treatments). Physical therapy = the branch of this family that uses device-based treatment. Important! The diagnosis comes first (what is causing your complaint), then you can choose the appropriate method to address it, and only then the device. Anyone who buys a device without a diagnosis is choosing the tool before knowing what needs to be repaired (you buy a hammer when you actually need a saw).
The family tree of physiotherapy: several methods, one goal
What connects the branches of physiotherapy is that each supports the body’s own ability to adapt and regenerate – only with different physical stimuli:
| Branch | What does it use? | Typical application |
|---|---|---|
| Movement therapy (therapeutic exercise) | Active and guided movement, exercises and underwater exercise | The backbone of musculoskeletal rehabilitation for almost every complaint – I wrote about the details in the article on movement and health |
| Massage and manual therapy | The therapist’s hands: therapeutic massage, connective-tissue techniques and lymphatic drainage | Muscle tension, adhesions and oedema – you can read about manual lymphatic drainage here |
| Hydrotherapy and balneotherapy | Water and therapeutic mineral water: spa baths, mud packs, suspension baths and underwater jet massage | Wear-related joint and spinal complaints – Hungary is a major therapeutic-water country, and the suspension bath is specifically a Hungarian invention4 |
| Climate and air therapy | The quality of inhaled air: cave therapy, salt therapy, seaside and high-altitude climates | Complementary treatment for respiratory complaints, asthma and COPD – see the detailed salt therapy guide |
| Thermotherapy | Heat and cold: packs, paraffin treatment and cryotherapy | Muscle and joint complaints – I wrote separate articles about heat therapy and cold therapy |
| Physical therapy (device-based branch) | Physical energy produced by a device: electricity, light, magnetic fields, ultrasound and compressed air | Pain relief, muscle and circulation therapy – the next chapter explains this in detail |
In practice, these branches are not competitors but complements to one another: treatment for someone with knee osteoarthritis may include therapeutic exercise (movement), a therapeutic spa (balneotherapy), and soft laser or magnetotherapy (physical therapy) – I wrote about who does what in this teamwork in the article who’s who in rehabilitation.
Why has the device-based branch entered people’s homes?
You cannot take the physiotherapist’s hands, the therapeutic spa pool or the cave climate home – but you can take a device home. The effects of physical therapy can be regulated well (current form, dose and duration), so safe home versions could also be developed. This made the device-based branch the “home-friendly” part of physiotherapy.
Physical therapy methods: what is each one used for?
The table below organises device-based treatments: what each method does, what it is primarily used for and where you can find detailed guidance.
| Method | What is it primarily used for? | Detailed guide |
|---|---|---|
| TENS (nerve stimulation) | Pain relief without medication – for joint, muscle, nerve and menstrual pain | TENS treatment guide · choosing a device |
| EMS (muscle stimulation) | Activating and rebuilding muscles – during rehabilitation after injury, surgery or restricted movement, and in sport | EMS guide · devices |
| Interferential therapy | Relieving pain in deeper tissues with a more comfortable electrical sensation | interferential therapy guide |
| Microcurrent (MENS) | Very low-current treatment to support wounds, scars and inflamed joints | microcurrent guide |
| Soft laser (photobiomodulation) | Treating joint and soft-tissue pain, wounds and skin problems with light | soft laser guide · choosing a device |
| Magnetotherapy (PEMF) | Complementary treatment for bone and joint complaints, osteoporosis and fracture healing | magnetotherapy guide |
| Therapeutic ultrasound | Deep-tissue treatment of tendon, muscle and joint problems with sound waves | ultrasound guide · devices |
| Pneumatic compression | Lymphoedema, venous complaints, heavy legs and sports recovery | lymphatic drainage device guide |
| tVNS (vagus stimulation) | Calming the stress system through non-invasive stimulation of the vagus nerve | tVNS guide |
Most methods belong to the group of electrical treatments – TENS, EMS, iontophoresis, Kozt, interferential therapy or microcurrent, etc. My article on which electrotherapy is used for what will help you find your way around.
How do physical stimuli work?
There’s nothing mystical about it! Physiotherapy is based on understanding and using physiological processes: physical stimuli trigger clearly describable responses in nerves, muscles, blood vessels and cells:
Nerves and muscles communicate through electrical signals – electrotherapy uses this language.
TENS stimulates sensory nerve fibres: through the pain-gate mechanism, it “overwrites” the pain signal at spinal-cord level and also supports the release of the body’s own pain-relieving substances.
EMS targets motor nerve fibres and makes the muscle contract – so it works even when voluntary movement is limited by injury or pain.
Interferential therapy creates a therapeutic current in deeper tissues where two medium-frequency currents meet, while microcurrent uses an imperceptibly weak current that corresponds to the natural electrical processes of tissue healing.
Soft laser light at a specific wavelength is absorbed by the tissues and affects cell metabolism – the scientific literature calls this photobiomodulation. Research suggests that the effect is dose-dependent: the appropriate wavelength and amount of energy matter, not the size or price of the lamp.2
Pulsed magnetotherapy (PEMF) reaches deeper tissues with a low-frequency electromagnetic field – its effects on bone metabolism and joint complaints have been studied primarily.3 Neither method is “radiation” in the everyday, frightening sense: a soft laser does not burn, while the field strength of PEMF is many orders of magnitude lower than that of diagnostic devices.
Therapeutic ultrasound performs a micromassage in deep tissues with sound waves that cannot be heard by the human ear – we use it to treat tendons, muscle attachments and joint capsules.
Pneumatic compression works differently: the air chambers in a cuff placed around the limb inflate intermittently and direct stagnant fluid in the natural direction of lymphatic and venous circulation – which is why it is a basic device for home treatment of lymphoedema and heavy-leg complaints, and for recovery in athletes. It can provide treatment with nearly the same effectiveness as manual lymphatic drainage (from which it inherited its operating principle).
When is physiotherapy needed – and what can you do at home?
Physiotherapy plays a role in four major areas:
- musculoskeletal complaints (joint wear, back pain, tendon and muscle injuries);
- rehabilitation after surgery and injuries;
- circulatory problems (lymphoedema, venous insufficiency);
- and certain neurological conditions (restoring muscle function after nerve injury and regulating the stress system).
What they have in common is that improvement is expected not from a single treatment but from regularity.
And it is precisely because of the need for regularity that device-based treatments have entered people’s homes: at a clinic, you can fit in two or three treatments a week, and at most 10-15 sessions. At home, you can treat yourself daily, according to your own schedule, as a course – right through to recovery.
For chronic complaints requiring long-term treatment – joint wear, tendon problems, lymphoedema and osteoporosis – this difference is what matters.
What a home device cannot replace is diagnosis, the exercise programme developed by a physiotherapist and medical supervision. Home physical therapy is a continuation and complement to professional treatment – not a way of avoiding it.
I wrote in detail about how this division of responsibilities works in practice in the article what home medical technology is used for.
My advice
Choose one method and stick with it consistently. The most common mistake I see is this: someone buys a device, uses it enthusiastically for three days, then it ends up in a drawer – and the next method follows. This is a mistake!
The effect of physiotherapy is not rapid! The effect is cumulative, meaning that the effects of treatments performed one after another at regular intervals “build on one another” and become increasingly stronger. You should not expect a meaningful effect from a single treatment. A regular course lasting several weeks is typically needed.
Before you buy, read the detailed guide to the method in question from the table above, and plan a treatment series lasting at least 4–6 weeks, with daily or every-other-day sessions. And whichever device you choose: none can replace movement – treatment always complements the exercise programme (therapeutic exercise), not replaces it.
When should you NOT use home physical therapy?
- Cardiac pacemaker or another implanted electronic device – electrotherapy and magnetotherapy must not be used
- Pregnancy – abdominal and lower-back treatments should be avoided; all other treatments only after medical consultation
- Cancer – any physiotherapy treatment only with the approval of the treating doctor
- Recent thrombosis or suspected thrombosis – prohibited particularly with compression and circulation-stimulating treatments
- Epilepsy – electrical stimulation only with the treating doctor’s permission
- Fever or acute infection – postpone treatment until recovery
When should you see a doctor?
Home treatment must be based on an established diagnosis! If your complaint is new and its cause is unknown; if it is accompanied by night-time or resting pain, fever, weight loss, numbness or muscle weakness; or if there is no improvement after 2–3 weeks of appropriate home treatment – medical assessment is needed first, and only then a device. Always have an accident or recent injury examined by a doctor before treating it in any way.
Frequently asked questions
Both are correct, but they do not mean the same thing. Physiotherapy is the complete family of treatments: movement therapy, massage, spa and climate treatments, and device-based treatments together. Physical therapy is the name for the device-based treatments within it (electrotherapy, laser, magnets, ultrasound and compression). In everyday speech, the two are often confused – a referral for “physical therapy” at a clinic almost always means machine-based treatments, while a “physiotherapist” is a professional working across the whole field, known in Hungary mainly as a “gyógytornász”.
The starting point is always the diagnosis, not the device. As a rule of thumb: TENS or soft laser for pain relief; EMS for rebuilding muscle; magnetotherapy or soft laser for bone and wear-related joint complaints; ultrasound or soft laser for tendon and soft-tissue problems; compression for swelling and heavy legs; and salt therapy for respiratory complaints. The tables above lead to detailed guidance for each method – there you can find out whether your specific complaint is among the indications.
It depends on the method. The pain-relieving effect of TENS appears during treatment and immediately afterwards, but it is temporary – which is why it needs to be repeated regularly. The effects of soft laser, magnetotherapy and ultrasound build up over a course, typically during 2–6 weeks of regular treatment, and may continue after the course ends. Spa and climate courses traditionally work in series lasting 2–3 weeks. Anyone expecting a dramatic change from a single treatment will be disappointed – anyone thinking in terms of a course has a realistic chance of benefit.
Yes, and in fact clinical and spa-medicine practice is also based on combinations. Useful pairings include TENS for pain + EMS for muscles; soft laser for the inflamed area + magnetotherapy for the joint; compression for swelling + an exercise programme; and a therapeutic spa + therapeutic exercise. Two rules: use only one device-based treatment on one area at a time, and follow the dosing instructions for each method. Neither replaces the exercise programme – always continue it alongside them.
No one can responsibly promise that. What research shows is that physiotherapy methods may reduce pain and therefore the need for pain medication – in the magnetotherapy knee study, for example, one quarter of the treated patients were able to stop taking anti-inflammatory medication3 – but always decide about your medication together with your treating doctor. A home device cannot override an indication for surgery: in such cases, physiotherapy has a role in maintaining your condition before surgery and in rehabilitation afterwards.
What does the research say?
“Does TENS really relieve pain, or is it just a placebo?”
This is one of the most thoroughly studied questions in the field: according to an analysis combining 381 randomised trials and more than 24 000 participants, pain was measurably lower with TENS than with placebo during treatment and immediately afterwards – with moderate certainty and no serious adverse effects.1 The effect is linked to the treatment and temporary, so TENS is worthwhile as a regular treatment and complement to an exercise programme – not as a one-off miracle.
“Does soft laser work, or is it just an expensive lamp?”
The answer depends on the dose. A review of 22 placebo-controlled trials in knee osteoarthritis found that soft laser produced a meaningful reduction in pain compared with placebo – but the effect was convincing in the studies that used the wavelength and energy dose recommended internationally.2 In practice, this means that it is not “the laser” that either works or does not work, but the device with the right parameters, correctly dosed – so read the soft laser guide before buying.
“Does magnetotherapy have any measurable effect at all?”
There is a study that measured it: in patients with knee osteoarthritis, one month of daily PEMF treatment in a double-blind, placebo-controlled study reduced pain more than placebo, improved physical function – and 26% of the treated group were able to stop taking pain medication.3 The proportions are important: this was a study of 60 people, so the evidence is promising but not conclusive – treat magnetotherapy as a complementary treatment, as I also explain in the detailed guide.
“Is a therapeutic spa really a treatment, or just a pleasant break?”
According to a review of 12 randomised trials in chronic low back pain, a spa course measurably reduced pain and improved spinal function compared with the control group – although the authors also point out that the quality of the studies varies, because spa treatment is difficult to compare “blind” with a placebo.4 The practical lesson is that Hungary’s therapeutic spa culture is not just tradition; it has a measurable effect – and it works best when combined with an exercise programme, not used instead of one.
Summary – Quick overview
Read more
Scientific sources
- Johnson MI, Paley CA, Jones G, Mulvey MR, Wittkopf PG (2022). Efficacy and safety of transcutaneous electrical nerve stimulation (TENS) for acute and chronic pain in adults: a systematic review and meta-analysis of 381 studies (the meta-TENS study). BMJ Open, 12(2), e051073. DOI: 10.1136/bmjopen-2021-051073
- Stausholm MB, Naterstad IF, Joensen J, et al. (2019). Efficacy of low-level laser therapy on pain and disability in knee osteoarthritis: systematic review and meta-analysis of randomised placebo-controlled trials. BMJ Open, 9(10), e031142. DOI: 10.1136/bmjopen-2019-031142
- Bagnato GL, Miceli G, Marino N, Sciortino D, Bagnato GF (2016). Pulsed electromagnetic fields in knee osteoarthritis: a double blind, placebo-controlled, randomized clinical trial. Rheumatology (Oxford), 55(4), 755–762. DOI: 10.1093/rheumatology/kev426
- Bai R, Li C, Xiao Y, Sharma M, Zhang F, Zhao Y (2019). Effectiveness of spa therapy for patients with chronic low back pain: An updated systematic review and meta-analysis. Medicine (Baltimore), 98(37), e17092. DOI: 10.1097/MD.0000000000017092
