Add cellular phones to the list that includes caffeine and hormones as culprits that interfere with a good night's sleep, according to a new study released Sunday.
Led by a Wayne State University professor, the study found that radiation from cell phones delayed the onset of sleep and shortened deeper stages of sleep, which can hinder the body's ability to repair itself and possibly lead to long-term health problems.
The study also showed radiation from cell phones caused headaches.
"We can conclude cell phones do have effects on the body," said Bengt Arnetz, a WSU professor and lead author of the study. "If you feel like you have problems sleeping, you can always consider moving the phone away from the bed."
Or not talking on it at night before going to sleep, Arnetz added.
The study, considered one of the most comprehensive measuring cell phones radiation and sleep, involved 36 woman and 35 men, aged 18-45.
Some received radiation volume similar to cell phone signals, while others did not.
Inadequate sleep is associated with a number of chronic health conditions such as diabetes, cardiovascular disease, obesity and depression, according to the Centers for Disease Control and Prevention.
Lack of sleep is also cited in some motor vehicle accidents.
The study was published by the Massachusetts Institute of Technology's Progress in Electromagnetics Research Symposium and funded by the Mobile Manufacturers Forum, an international association of radio communications equipment manufacturers.
According to its Web site, the MMF was formed in 1998 to facilitate joint funding of research projects and cooperation on standards, regulatory issues and communications concerning wireless technology and health.
Members include Alcatel-Lucent, Ericsson, Mitsubishi Electric, Motorola, Nokia, Panasonic, Philips, Sagem, Samsung, Nokia-Siemens Networks, Sony Ericsson and TCL & Alcatel Mobile Phones.
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