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Sleeping with a light on could be
for your heart. Researchers in the USA say
a light that is not very
could be harmful. The researchers did
on 11,000 people. The people wore
that measured the amount of light in their bedrooms. People who had no heart disease had an MRI
three years later. The scans showed a
between sleeping with a light on and
in the structure of the heart. One change was
heart muscles. Another change was the heart was less able to pump
, stretch, and relax during heartbeats.
