Highlights
- Localized PEMF exposure significantly increased bone mineral density.
- The strongest effect occurred in the area directly exposed to the field.
- A secondary systemic “cross-talk” effect was observed in the untreated limb.
- Findings support the clinical potential of PEMFs for osteoporosis prevention.
Study Design
This experimental study included 20 women at risk of developing osteoporosis. The nondominant forearm of each participant was exposed to a 72 Hz pulsed electromagnetic field (PEMF) for 10 hours per day over a 12-week period. Bone mineral density was assessed before, during, and after the intervention using single-photon densitometry with a Norland-Cameron bone mineral analyzer.
What Did They Find?
The treated radii showed a significant increase in bone mineral density during the exposure period, particularly in the area directly affected by the electromagnetic field. Following the intervention, bone density gradually declined over the subsequent 36 weeks. A similar but weaker response was detected in the contralateral, untreated arm, suggesting a possible systemic or indirect electromagnetic “cross-talk” effect.
When the electromagnetic field was applied directly to the bone, bone density increased significantly over the 12-week treatment period. (The graphs presented are illustrative and reflect trends observed in the original study, rather than absolute values of bone mineral density).
Why It Matters
These findings indicate that properly applied PEMFs can positively influence bone density. If adapted for whole-body applications, PEMF therapy may offer a valuable non-invasive approach for the prevention and management of osteoporosis, particularly in individuals at increased risk.
Reference: Tabrah F, Hoffmeier M, Gilbert F Jr, Batkin S, Bassett CA. Bone density changes in osteoporosis-prone women exposed to pulsed electromagnetic fields (PEMFs). J Bone Miner Res. 1990;5(5):437-442. doi:10.1002/jbmr.5650050504