The earth has had magnetism within it
 for a long time.
Without the magnetism, everything on earth, including air and water, would instantly perish from the plasma of the sun. The biological environment of living organisms has been protected from magnetism and has survived by taking well-regulated solar energy. All living organism, including human beings, are adapted for such environment.
There have been more steel-frame and reinforced buildings lately. Magnets are attracted to iron. People purposely live in magnetic shield rooms. Also, metallic boxes such as trains and cars have only half of the magnetism that is outside. If you think about the relationship of magnets and the body, it is believed that the body is influenced by the decline of magnetism. If you take a look at the relationship between earth and human beings, our bodies needs more magnetic fields.

There are some weak magnetic areas in the body.
When magnets are activated there, the ionization in the blood advances.
Also, the action of the autonomic nerves controlling the blood flow in the body changes, getting better the blood flow and eliminating the symptoms such as stiffness in the shoulders and lower back.
If the autonomic nerves are regulated,fundamenta