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Oxidative Stress

Influence of low frequency magnetic field on chosen parameters of oxidative stress in rat's muscles.

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Ciejka E, Skibska B, Kleniewska P, Goraca A. · 2010

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Therapeutic magnetic field devices at 7 milliTesla caused oxidative stress in rat muscle tissue after just two weeks of daily exposure.

Plain English Summary

Summary written for general audiences

Polish researchers exposed rats to 40 Hz magnetic fields (the type used in medical magnetotherapy) for either 30 or 60 minutes daily over two weeks. They found significant biochemical changes in muscle tissue, including increased sulfur compounds and altered protein levels, indicating the magnetic fields triggered oxidative stress. This suggests that even therapeutic magnetic field devices can cause measurable cellular damage in muscle tissue.

Why This Matters

This study adds important evidence to our understanding of how extremely low frequency magnetic fields affect cellular health, even at levels considered therapeutic. The 7 milliTesla exposure used here is significantly higher than typical household EMF levels (which range from 0.01 to 1 milliTesla near appliances), but it's precisely the intensity used in medical magnetotherapy devices that millions of people use for pain relief and healing. The researchers found clear biochemical markers of oxidative stress in muscle tissue after just two weeks of exposure. What makes this particularly concerning is that oxidative stress is a fundamental mechanism underlying numerous health problems, from accelerated aging to chronic inflammation. The fact that these changes occurred with therapeutic devices that are marketed as beneficial highlights the complex reality of EMF bioeffects. The science demonstrates that magnetic fields can trigger measurable biological responses even when they're intended to help, not harm.

Exposure Details

Magnetic Field
7 mG
Source/Device
40 Hz
Exposure Duration
0.5 h/day for 14 days(1st group) & 1 h/day for 14 days(2nd group)

Exposure Context

This study used 7 mG for magnetic fields:

Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 7 mGExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Extreme Concern rangeFCC limit is 286x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 40 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 40 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Study Details

The aim of this study was to evaluate the influence of low magnetic field on the parameters of oxidative stress in rat's muscles

Thirty male rats, weight of 280-300 g were randomly divided into three experimental groups: control ...

Exposure to ELFMF: 40 Hz, 7 mT, 30 and 60 min/day used for 2 weeks caused significant increase in -S...

Low magnetic field used in magnetotherapy causes the significant changes of the generating the reactive forms of oxygen in the muscles which depend on the parameters of low magnetic field.

Cite This Study
Ciejka E, Skibska B, Kleniewska P, Goraca A. (2010). Influence of low frequency magnetic field on chosen parameters of oxidative stress in rat's muscles. Pol Merkur Lekarski. 29(174):361-364, 2010.
Show BibTeX
@article{e_2010_influence_of_low_frequency_336,
  author = {Ciejka E and Skibska B and Kleniewska P and Goraca A.},
  title = {Influence of low frequency magnetic field on chosen parameters of oxidative stress in rat's muscles.},
  year = {2010},
  
  url = {https://europepmc.org/article/med/21298985},
}
PubMed: 21298985

Cited By (2 papers)

Quick Questions About This Study

Yes, research shows magnetic therapy devices can cause cellular damage in muscles. A 2010 Polish study found that 40 Hz magnetic fields used in medical magnetotherapy triggered oxidative stress and biochemical changes in rat muscle tissue after just two weeks of exposure.
Studies indicate 40 Hz magnetic field exposure can harm muscle tissue by causing oxidative stress. Polish researchers found significant biochemical changes in rat muscles, including altered protein levels and increased sulfur compounds, after daily exposure to therapeutic magnetic fields.
Yes, magnetotherapy can negatively impact muscle health by generating reactive oxygen species. Research demonstrates that even therapeutic 40 Hz magnetic fields cause measurable oxidative stress and protein changes in muscle tissue within two weeks of regular exposure.
Magnetic field therapy poses oxidative stress risks to muscle tissue. A controlled study found that 40 Hz therapeutic magnetic fields significantly altered muscle biochemistry, increasing sulfur compounds and decreasing protein concentration, indicating cellular damage from reactive oxygen formation.
Low frequency magnetic field exposure increases oxidative stress by generating reactive oxygen species in tissues. Research shows 40 Hz magnetic fields cause significant biochemical changes in muscles, with effects depending on exposure duration and field parameters used.