While it is common for people to do things in their sleep that they do during the day, they do them more clumsily or inaccurately, says Anderson.
Melatonin is vital for maintaining the body's correct diurnal rhythms - helping a person sleep at night and stay awake during the day.
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If snoring is combined with feeling sleepy during the day and experiencing pauses in breathing during sleep, people may be suffering from the more serious sleep apnoea - which affects 10 to 20% of snorers - and should see their GP.
"It is very common for people to do things in their sleep that they do repeatedly during the day, " says Anderson.
During the financial crisis, Americans went to sleep wondering what the next day would bring.
They had been planning to attend political training classes and participate in group activities during the day and sleep in tents at night, he said.
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Many researchers hold almost precisely the opposite opinion that sleep serves to re-activate synapses that were strengthened during the day, and thus reinforces their strength rather than diminishing it.
LoRusso says a good way to check your sleep habits is to note your levels of fatigue during the day and jot down other symptoms you might be having.
"If kids are getting adequate sleep, they're going to have more energy during the day to be physically active, " says Dalton, who has researched the link between families and obesity but was not involved in the current study.
Currently, many drugs and treatments exist that improve productivity, from Adderall to treatments for sleep apnea (which would otherwise leave some individuals exhausted during the work day).
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One of the most common indicators of loneliness is broken sleep taking a long time to fall asleep, waking frequently, and feeling sleepy during the day.
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