Tablet, Computer, Smartphone
or TV before Bed May Cause Cancer
2014 - It is doubtless that e-readers, tablet, computer, smartphone
digital television have considerably revolutionized the way people communicate and entertain
themselves. And day by day new devices
appear on the market, making life easier in term of communication and entertainment.
But behind this technological sustainable progress, there are
Reading these electronic devices right before bed can permanently disrupt sleep cycle and increase risk for prostate cancer and breast cancer,
new study has found. Individuals who read on a screen of a tablet, computer, smartphone
or television before going to bed
feel less natural
signs of fatigue
longer to fall
asleep, according to a to new research from Brigham and Women's Hospital in Boston, Massachusetts, published in
the journal Proceedings of the National
During the study,
the researchers observed
a dozen people
on some type
of electronic reading
other on paper
(printed book). Important
differences have been
noted between the two groups. These electronic devices emit
light to the
face, causing users
experience less natural
signs of fatigue
longer to fall
brains secrete less melatonin
(hormone mainly released at
night which plays a role in natural sleep-wake
compared to members
of the other group who read
printed Academy of Sciences
books. Even more
striking, their body
is shifted by
a half hour
needed to sleep. In the
need more time
to feel fully
Chronic Insomnia, Breast Cancer and Prostate
Screens of computer, smart phones or
backlit e-readers have in common the use of light emitting diodes (LED) which diffuse to the face. Furthermore
they show a high light intensity comparing to ordinary lamps; LEDs produce much more blue light, leading to
chronic insomnia. However, present in the natural light, perceived through the lens of the eyes, it enables the
body to regulate the internal clock, also called circadian rhythm, a 24-hour cycle that tells the body when to
sleep and regulates many other physiological functions.
The scientists behind the
study thus summarize, "These results
indicate that reading on this type
light in the hours
before bedtime has
unintended biological effects
that can have a
negative impact on
and safety." Not only lack of
sleep can affect the quality of sleep and alertness, but it can also lead to other health problems such as obesity, diabetes, and cardiovascular
disease, as well as different types of cancer.
In various other
studies, it has been demonstrated that a chronic decrease
secretion increases the risk of
developing breast cancer and prostate cancer. Previous studies
found a negative impact
on cardiovascular functions,
memory and metabolism. In fact, some recent studies have found that people who work night shifts may be at
increased risk for cancer, which could be linked to melatonin levels in the body.
Some researchers believe that the
solution is to avoid screen of those electronic devices during bedtime but read printed book which increase
melatonin secretion and improve sleep.
Light-Emitting E-Readers Before Bedtime Can Adversely Impact
Sleep - http://www.brighamandwomens.org/about_bwh/publicaffairs/news/pressreleases/PressRelease.aspx?sub=0&PageID=1962
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