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Influence of a radiofrequency electromagnetic field on cardiovascular and hormonal parameters of the autonomic nervous system in healthy individuals.

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Braune S, Riedel A, Schulte-Monting J, Raczek J. · 2002

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Mobile phone radiation showed no acute cardiovascular effects in healthy adults, but long-term impacts remain unstudied.

Plain English Summary

Summary written for general audiences

German researchers exposed 40 healthy young adults to mobile phone radiation (900 MHz) for specific periods while measuring blood pressure, heart rate, and stress hormones. While participants' blood pressure increased by about 5 mmHg during the testing protocol, this increase occurred equally during both real and fake (placebo) exposures. The study found no evidence that mobile phone radiation affects cardiovascular function or the nervous system that controls blood pressure.

Why This Matters

This study represents a well-designed investigation into one of the most concerning potential health effects of mobile phone use - impacts on cardiovascular function. The researchers used proper controls and measured multiple parameters including stress hormones like norepinephrine and cortisol. However, the 5 mmHg blood pressure increase observed in both exposure and placebo conditions suggests the effect was likely due to the experimental procedure itself rather than EMF exposure. What this means for you: while this particular study found no cardiovascular effects from 900 MHz radiation, it examined only acute exposure in healthy young adults. The reality is that real-world mobile phone use involves chronic, repeated exposures over years or decades, often in people with existing health conditions - scenarios this study didn't address.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 217 Hz - 900 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 217 Hz - 900 MHzPower lines50/60 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study. The study examined exposure from: 900 MHz, pulsed with 217 Hz Duration: 20 min of supine rest, 10 min of 70° upright tilt on a tilt table, and another 20 min of supine rest

Study Details

The present study investigated the hypothesis, based on the results of our previous study, that exposure to EMFs can increase sympathetic vasoconstrictor activity.

Forty healthy young males and females underwent a single-blind, placebo-controlled protocol once on ...

Similar to the previous study, systolic and diastolic blood pressure each showed slow, continuous, s...

These findings do not support the assumption of a nonthermal influence of EMFs emitted by mobile phones on the cardiovascular autonomic nervous system in healthy humans.

Cite This Study
Braune S, Riedel A, Schulte-Monting J, Raczek J. (2002). Influence of a radiofrequency electromagnetic field on cardiovascular and hormonal parameters of the autonomic nervous system in healthy individuals. Radiat Res 158(3):352-356, 2002.
Show BibTeX
@article{s_2002_influence_of_a_radiofrequency_1925,
  author = {Braune S and Riedel A and Schulte-Monting J and Raczek J.},
  title = {Influence of a radiofrequency electromagnetic field on cardiovascular and hormonal parameters of the autonomic nervous system in healthy individuals.},
  year = {2002},
  
  url = {https://meridian.allenpress.com/radiation-research/article-abstract/158/3/352/375833/Influence-of-a-Radiofrequency-Electromagnetic},
}

Quick Questions About This Study

No, 900 MHz cell phone radiation does not affect blood pressure according to a 2002 German study. While participants' blood pressure increased by 5 mmHg during testing, this increase occurred equally during both real radiation exposure and fake (placebo) exposures, proving the radiation had no effect.
No, mobile phone radiation pulsed at 217 Hz does not harm healthy adults. German researchers found that 900 MHz radiation with 217 Hz pulsing had no effect on cardiovascular function, blood pressure, heart rate, or stress hormones in 40 healthy young participants.
Stress hormones remain unchanged during cell phone radiation exposure. The 2002 Braune study measured stress hormones in healthy adults exposed to 900 MHz mobile phone radiation and found no significant changes, with hormone levels either decreasing in parallel or staying constant regardless of exposure.
No, 900 MHz EMF exposure does not affect autonomic nervous system function. German researchers specifically tested whether mobile phone radiation influences the cardiovascular autonomic nervous system in healthy humans and found no evidence of any nonthermal effects on nervous system control of blood pressure.
Yes, placebo effects can occur when testing mobile phone radiation health impacts. The Braune study found that participants' blood pressure increased by 5 mmHg during both real 900 MHz radiation exposure and fake exposures, demonstrating that psychological factors can create measurable physiological changes during EMF research.