If you have ever held two magnets in your hands, tried to force them together, and felt a resistance between them, then you have experienced a magnetic field. That type of magnetic field is produced by a static magnet and is called a static magnetic field. A changing magnetic field (such as a magnetic field moving through a coil) generates an electric field (which would drive a current in the coil). This forms the basis for many electrical generators and motors. Similar to the way that a changing magnetic field generates an electric field, a changing electric field generates a magnetic field. Since the magnetic field is being generated by an electric current, it’s called an electromagnetic field – a physical field produced by moving electrical charges. PEMF stands for Pulsed Electromagnetic Field. Magnetic fields affect the behavior of any other charged objects in the vicinity of the field. This is the fundamental basis for their therapeutic use. Our bodies are electric – every heartbeat generates electromagnetic waves throughout the blood vessels of the body, stimulating tissues at a cellular level. External magnetic fields and the normal electric and electromagnetic fields produced by the body interact. So, a magnetic field passing through our whole body will have an electromagnetic effect on each of our 70 trillion cells. As a result, magnetic fields act in basic and fundamental ways on molecules and tissues. They affect the most basic functions of all cells—human, animal, and plant included.
