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Sleep after mobile phone exposure in subjects with mobile phone-related symptoms.

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Lowden A, Akerstedt T, Ingre M, Wiholm C, Hillert L, Kuster N, Nilsson JP, Arnetz B. · 2011

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Cell phone radiation at safety-limit levels reduced restorative deep sleep by 12% and altered brain waves for hours after exposure.

Plain English Summary

Summary written for general audiences

Researchers exposed 48 people to cell phone radiation (884 MHz) for 3 hours before bedtime, then monitored their brain waves during sleep. The radiation exposure reduced deep sleep (slow-wave sleep) by 12% and increased lighter Stage 2 sleep, while also altering brain wave patterns throughout the night. This suggests that cell phone radiation can disrupt the quality of sleep even after exposure ends.

Why This Matters

This controlled laboratory study adds to mounting evidence that radiofrequency radiation affects brain function in measurable ways. The 1.4 W/kg exposure level used here is within current safety limits and comparable to what you might experience during extended phone calls held close to your head. What makes this research particularly significant is that it demonstrates biological effects persisting hours after exposure ended. The 12% reduction in deep sleep is concerning because slow-wave sleep is critical for memory consolidation, physical recovery, and overall health. The reality is that many people keep their phones near their beds or use them extensively in the evening, potentially creating chronic sleep disruption patterns that could compound over time.

Exposure Details

SAR
1.4 W/kg
Source/Device
884 MHz
Exposure Duration
continuous for 3 hr

Exposure Context

This study used 1.4 W/kg for SAR (device absorption):

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: 1.4 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern rangeFCC limit is 1x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 884 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 884 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

We investigated the effects of a double‐blind radiofrequency exposure (884 MHz, GSM signaling standard including non‐DTX and DTX mode, time‐averaged 10 g psSAR of 1.4 W/kg) on self‐evaluated sleepiness and objective EEG measures during sleep.

Forty‐eight subjects (mean age 28 years) underwent 3 h of controlled exposure (7:30–10:30 PM; active...

The results demonstrated that following exposure, time in Stages 3 and 4 sleep (SWS, slow‐wave sleep...

Cite This Study
Lowden A, Akerstedt T, Ingre M, Wiholm C, Hillert L, Kuster N, Nilsson JP, Arnetz B. (2011). Sleep after mobile phone exposure in subjects with mobile phone-related symptoms. Bioelectromagnetics. 32(1):4-14, 2011.
Show BibTeX
@article{a_2011_sleep_after_mobile_phone_131,
  author = {Lowden A and Akerstedt T and Ingre M and Wiholm C and Hillert L and Kuster N and Nilsson JP and Arnetz B. },
  title = {Sleep after mobile phone exposure in subjects with mobile phone-related symptoms.},
  year = {2011},
  doi = {10.1002/bem.20609},
  url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/bem.20609},
}
DOI: 10.1002/bem.20609

Cited By (85 papers)

View all 85 citing papers on Semantic Scholar

Quick Questions About This Study

Yes, a 2011 study found that 884 MHz cell phone radiation reduced deep sleep (slow-wave sleep) by 12% when participants were exposed for 3 hours before bedtime. The exposure also increased lighter Stage 2 sleep by 4% and altered brain wave patterns throughout the night.
Research shows that 884 MHz cell phone radiation exposure before bedtime significantly altered brain wave patterns during sleep. The study found enhanced brain wave activity in specific frequency ranges during the first two hours of lighter sleep stages, confirming changes in sleep brain activity.
According to 2011 research, 884 MHz cell phone radiation exposure delayed the onset of deep sleep (Stage 3) by nearly 5 minutes. This means it took participants longer to reach the most restorative sleep stage after being exposed to cell phone radiation.
No, the 2011 study found no differences in sleep parameters between people who reported mobile phone-related symptoms and those who didn't. Both groups showed the same sleep disruption patterns when exposed to 884 MHz radiation before bedtime.
A 2011 study found that 884 MHz cell phone radiation increased Stage 2 sleep by 8.3 minutes (4%) compared to sham exposure. This lighter sleep stage showed enhanced brain wave activity in specific frequency ranges during the first two hours after radiation exposure.