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Extremely low frequency electromagnetic field (ELF-EMF) reduces oxidative stress and improves functional and psychological status in ischemic stroke patients.

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Cichoń N, Bijak M, Miller E, Saluk J. · 2017

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In post-stroke patients, ELF-EMF exposure significantly increased antioxidant enzyme activity and improved functional and mental status scores.

Plain English Summary

Summary written for general audiences

Researchers investigated the effect of ELF-EMF on clinical and antioxidant status in post-stroke patients. Fifty-seven patients were divided into two groups: ELF-EMF and non-ELF-EMF, and both groups underwent the same 4-week rehabilitation program. The ELF-EMF group was additionally exposed to a field of 40 Hz, 7 mT for 15 min/day for 4 weeks, 5 days a week. ELF-EMF significantly increased enzymatic antioxidant activity, though total antioxidant status levels did not change in either group.

Why This Matters

The study measured the activity of catalase and superoxide dismutase in hemolysates, and total antioxidant status in plasma. Functional status was assessed before and after the series of treatments using Activities of Daily Living, Mini-Mental State Examination, and Geriatric Depression Scale. Researchers found that clinical parameters had a positive correlation with the level of enzymatic antioxidant protection.

Exposure Details

Magnetic Field
7 mT
Source/Device
40 Hz
Exposure Duration
15 min/day for 4 weeks (5 days a week)

Exposure Context

This study used 7 mT 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 mTExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Extreme Concern range (Building Biology)This level is 35 times the FCC limit
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 our study was to investigate the effect of ELF-EMF on clinical and antioxidant status in post-stroke patients.

Fifty-seven patients were divided into two groups: ELF-EMF and non-ELF-EMF. Both groups underwent th...

Applied ELF-EMF significantly increased enzymatic antioxidant activity; however, TAS levels did not ...

Cite This Study
Cichoń N, Bijak M, Miller E, Saluk J. (2017). Extremely low frequency electromagnetic field (ELF-EMF) reduces oxidative stress and improves functional and psychological status in ischemic stroke patients. Bioelectromagnetics. 38(5):386-396, 2017a.
Show BibTeX
@article{n_2017_extremely_low_frequency_electromagnetic_333,
  author = {Cichoń N and Bijak M and Miller E and Saluk J.},
  title = {Extremely low frequency electromagnetic field (ELF-EMF) reduces oxidative stress and improves functional and psychological status in ischemic stroke patients.},
  year = {2017},
  doi = {10.1002/bem.22055},
  url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/bem.22055},
}
DOI: 10.1002/bem.22055

Cited By (61 papers)

View all 61 citing papers on Semantic Scholar

Quick Questions About This Study

The study focused on post-stroke patients, investigating the effect of ELF-EMF on their clinical and antioxidant status.
The ELF-EMF group was exposed to a field of 40 Hz, 7 mT for 15 min/day for 4 weeks, 5 days a week.
Total antioxidant status levels did not change in either group.
Functional status was assessed using Activities of Daily Living, Mini-Mental State Examination, and Geriatric Depression Scale, measured before and after treatments.
Clinical parameters had a positive correlation with the level of enzymatic antioxidant protection.