I also worked with a physician friend who owns sensitive electrical testing equipment. In my practice, I now frequently replace needles for magnets. In this way, they can be used for all kinds of problems, especially for pain, fibromyalgia and strains. They work on red blood cells because they contain iron. I placed a round bullseye magnet on a nurse's knee bruise following a ski injury.
Most people report warmth and gentle tingling under the magnets.
Europeans have measured increased blood flow. Others have seen this on thermograms too. They affect some chemical processes within and between cells. Chemists use sensitive magnetic equipment to measure simple and complex molecules. Researchers at Harvard found that salt water passes a membrane quicker with a magetic field.