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The
for older people to sleep well could be how hot or cold their
is. Researchers say the best
to sleep well is for the
to be between 20-25º Celsius. The researchers are from Harvard University and an institute for aging
. They asked 50 people aged 65 and older to wear a sleep
for 18 months. The people's
of sleep worsened when their room
was outside the 20-25-degree
. Researchers say 20ºC is the best temperature. They said: "Sleep tends to come easier and is often
…in a cooler environment."
