Do Magnets Help Relieve Low Back Pain?
March 7, 2000 (Baltimore) -- Treating people with chronic low back pain with
one particular type of magnet did not help relieve the patients' pain, a study
in the March 8 issue of TheJournal of the American Medical
Association reports. But experts say that much more research is needed on
magnet therapy before concluding that it doesn't work.
Magnet therapy is an alternative medicine that has become increasingly
popular for healing and reducing pain. Worldwide, $5 billion has been spent on
magnets to treat everything from back pain to headaches. But very little
research has been done to determine whether magnet therapy actually works.
"Magnets have been around for a very long time," says the study's
lead author, Edward Collacott, MD. "There are reports that Cleopatra slept
with a magnet on her forehead to help preserve her youth, and certainly we are
seeing large numbers of people using them today. Even though we did not observe
a reduction in low back pain with magnet use in our study, I am not prepared to
say they don't work. Right now I would say that if people are having success
with them in treating their condition, they shouldn't use this study as
evidence to throw them out." Collacott is medical director for physical
medicine and rehabilitation at the VA Medical Center in Prescott, Ariz.
The study looked at magnet use in 20 people with low back pain who had never
tried magnets before to treat their condition. Study participants were asked to
rate their pain using a pain scale and questionnaire. Measures of their spine
flexibility were taken before and after treatment.
"The type of magnet used in this study was bipolar," says Collacott.
Magnets typically have two poles, a north and a south. Some commercially
available magnets have one pole facing the skin, called unipolar. Bipolar
magnets' magnetic material is arranged so that both poles are facing the skin,
People in the study used the magnets for six hours a day on Monday,
Wednesday, and Friday for a period of one week. After a week with no treatment,
they used something that looked exactly like the magnet but was not magnetized,
called sham treatment.
The researchers found no differences between magnet therapy and sham therapy
for pain reduction, Collacott says. "We found no adverse effects as a
result of treatment. Based on this study, however, I am not prepared to say
that magnets don't work. We could have used the wrong magnet, or used it
The researchers refused to reveal the manufacturer of the magnets used in
the study, so WebMD contacted BIOflex Medical Magnetics Inc., one manufacturer
of magnets used for therapy.
"I'm not surprised that this magnet didn't succeed in the study, because
it's just not designed correctly," says Ted Zablotsky, MD, president of
BIOflex. He says his company's magnets were not those used in the research, and
he argues that the type of magnets used in the study are not effective.
"All magnets are not created equal," he tells WebMD.