No. Most patients feel a gentle tingling or buzzing sensation beneath the electrodes. Intensity is adjusted to each patient's comfort. The medium-frequency carrier current reduces skin impedance, so surface sensation is far less than traditional TENS.

How long is a typical IFT session?

Most sessions last 12-20 minutes depending on the condition and area treated. Multiple areas may be treated in a single session. Relief often begins during treatment.

How many IFT sessions will I need?

Acute conditions typically show improvement within 3-5 sessions. Chronic conditions may require 6-10 sessions alongside exercise therapy and manual treatment. Your physiotherapist will assess progress at each visit.

Are there any contraindications?

IFT is avoided over pacemakers, during pregnancy (over the abdomen/low back), over active malignancies, and over open wounds or infections. Your physiotherapist screens for these before treatment.

Therapeutic Technique

Interferential Therapy (IFT): Drug-free pain relief

IFT uses intersecting medium-frequency currents to penetrate deep tissues, reducing pain and inflammation without medication. One of the most widely used electrotherapy modalities in physiotherapy.

What is IFT?

Interferential Therapy (IFT) delivers two medium-frequency alternating currents that intersect inside the body, creating a low-frequency 'beat' modulation deep within the tissues. This interference pattern stimulates nerves, blocks pain signals, and increases blood flow - all without the surface discomfort of low-frequency currents.

The Science

How it works

Electrode placement & frequency selection

Four electrodes are placed around the treatment area. The currents cross at the target depth - typically 4-5 kHz - producing an interferential beat frequency between 1-150 Hz that matches the therapeutic goal (pain gate vs. endorphin release).

Pain gate mechanism

At 80-150 Hz, IFT stimulates large-diameter A-beta nerve fibres, which 'close the gate' at spinal cord level to pain signals from smaller C fibres. Relief begins during the session and can last hours after.

Circulatory & metabolic effects

At 1-10 Hz, IFT triggers vasodilation and increased capillary circulation. Improved blood flow clears inflammatory metabolites, reduces oedema, and delivers oxygen and nutrients to damaged tissues.

Key benefits

Significant reduction in acute and chronic musculoskeletal pain
Decreased soft tissue swelling and oedema
Accelerated healing of ligament sprains and muscle strains
Non-invasive and drug-free - ideal when medication is contraindicated
Can be combined with exercise therapy during the same session

Conditions treated

Low back pain and sciatica
Knee osteoarthritis and joint stiffness
Frozen shoulder and rotator cuff tendonitis
Cervical spondylosis and neck pain
Sports injuries - ankle sprains, muscle contusions

Scientific references

The techniques we use are supported by published clinical research.

• Goats GC. Interferential current therapy. Br J Sports Med. 1990.
• Hurley DA et al. Interferential therapy electrode placement in acute low back pain. Arch Phys Med Rehabil. 2004.

Frequently asked questions about this technique

Want to know if this technique is right for you?

Book a consultation. We'll assess your condition and recommend the most effective treatment approach - whether it's this technique or a combination tailored to your needs.

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Phone

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adaptrehabilitation@gmail.com

Location

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Hours

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