In 40 seconds
Every healthy cell in the body holds an electrical charge of around –70 millivolts across its membrane. This voltage powers every cellular function — protein synthesis, ion transport, signalling, repair. When cells are stressed, inflamed, or injured, the voltage drops below –50 mV and they can't function or repair efficiently. PEMF therapy delivers pulsed magnetic fields that induce micro-currents at the cell membrane, restoring voltage to functional levels. This is why PEMF is sometimes called 'cellular exercise' or 'recharging the body's batteries' — the metaphor is rough but biologically grounded.
Quick facts
- Healthy cell voltage: ~–70 millivolts
- Stressed / injured: Drops to –50 mV or lower
- Cancer cells: Often –20 mV or less
- PEMF restores: Back toward –70 mV
- Mechanism: Voltage-gated calcium channels
Practical guidance
See FAQ below for specific scenarios.
Contraindications
Standard PEMF contraindications: pacemakers, defibrillators, cochlear implants, insulin pumps, electronic implants; active malignancy without specialist clearance; pregnancy (over the abdomen); active infection; epilepsy without GP clearance.
Frequently asked questions
Where does cellular voltage come from?
Mitochondria generate ATP, which powers the sodium-potassium pump in the cell membrane. The pump moves ions, producing the voltage difference.
Why does voltage matter?
Voltage drives every active cellular process — repair, signalling, division, protein synthesis. Low voltage = poor function.
How does PEMF restore voltage?
Pulsed magnetic fields induce micro-currents in tissue. These currents stimulate voltage-gated calcium channels in cell membranes, triggering a cascade that ramps up ATP production and restores membrane voltage.
Is the 'body battery' analogy accurate?
Roughly. Cells aren't single batteries but each holds a charge. The metaphor captures the idea that depleted cells repair poorly and PEMF helps restore them.
Looking for a PEMF clinic near you?
We list every credible PEMF therapy provider in the UK so you can find one near home.