The study also involved researchers from the University of Wisconsin-Madison, and explored this question via a randomized clinical trial involving 80 adults. These subjects were overweight and had habitually short sleep duration, of less than 6.5 hours a night, a recognized risk factor for obesity. The idea was to investigate whether extending their sleep duration could mitigate this risk, with the subjects taking part in a four-week study, the first two weeks of which were used to gather baseline information on sleep and caloric intake.
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