Paragraph 1
We all know that going to
early is good for us. Scientists may have found the
time to go to bed. They say a
of between 10pm and 11pm is
because it lowers the risk of heart disease. Six years ago, the scientists collected
on the sleep patterns of 80,000
. The researchers collected data on their sleeping and waking
. They then monitored the volunteers'
for six years. Around 3,000 volunteers developed heart problems. They went to bed
or later than the "healthy" 10pm to 11pm
.
