The mattress pads used in this study were typical full-size pads containing 124 permanent ferrite magnets with magnetic field strengths of 750–950 gauss each. The pads themselves were made of two sheets of felt with the magnets sandwiched between them. The felt sheets were then wrapped in a cloth cover.
The total number of subjects of this double-blind clinical experiment was 431 (216 male, 215 female). 375 subjects were given the magnetic pads, and 56 were given non-magnetic pads. None of the 431 subjects knew which pad they were sleeping on.
Subjects selected for the experiment were those with chief complaints related to:
- Neck and shoulder pain
- Back and lower back pain
- Back pain (general)
- Lower limb pain
- Insomnia
- Fatigue
To determine the presence of any side effects, blood pressure, hemoglobin, number of erythrocytes, and number of leucocytes were examined before and after the use of the mattress pads. Blood sedimentation, TP, COL, ALP, GOT, GPT, Na, and K were also examined, along with functions of the kidneys, liver, pancreas, and the entire circulatory system.
Results
| Symptom | Cases | Positive Results | No Results | ||
|---|---|---|---|---|---|
| Count | % | Count | % | ||
| Neck and shoulder pain | 66 | 47 | 71.2 | 19 | 28.8 |
| Back and lower back pain | 76 | 61 | 80.3 | 15 | 19.7 |
| Back pain (general) | 31 | 25 | 80.7 | 6 | 19.3 |
| Lower limb pain | 68 | 54 | 79.4 | 14 | 20.6 |
| Insomnia | 70 | 61 | 87.1 | 9 | 12.9 |
| Fatigue | 64 | 53 | 82.8 | 11 | 17.2 |
Out of 375 total subjects with symptoms, 301 (80.27%) reported positive results, while 74 (19.73%) reported no results.
Time of Response
The percentage of subjects who realized the effect within 3 days:
| Symptom | Response Within 3 Days (%) |
|---|---|
| Neck and shoulder pain | 46.9% |
| Back and lower back pain | 50.0% |
| Back pain | 38.7% |
| Lower limb pain | 54.4% |
| Insomnia | 64.3% |
| Fatigue | 57.8% |
Out of 375 subjects, 200 (53.3%) realized the effects within 3 days, and over 70% within 5 days.
Conclusion
Dr. Shimodaira’s conclusion from this year-long study conducted in three of Japan’s foremost hospitals:
“The magnetized health mattress pad is proved to be effective on neck and shoulder pain, back and lower back pain, back pain, lower limb pain, insomnia, and fatigue, and to have no side effects.”