An Australian study shows that a daily nap for kids 4 to 7 years of age may reduce sleep time at night, as reported by Reuters Health.

Kids in childcare settings with mandatory nap times of 60 minutes or more slept less at night than other children, and their sleep time remained reduced even after they graduated to classes without nap time.

“The findings may not be such a surprise to some parents who commonly report that when made to nap in childcare, children often go to sleep later and have more difficulty falling asleep,” said lead author Sally L. Staton of the Queensland University of Technology by email.

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