Previously, we found that a 1.5 hour afternoon nap could improve performance in sleep-deprived adolescents. Interestingly, we also found that this split sleep schedule benefits learning after a nap opportunity without impairing morning learning, despite less sleep the night before. While not replacing adequate nocturnal sleep, a split sleep schedule may be beneficial for chronically sleep restricted learners.
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In 2019, NFS5 aimed to uncover whether napping is still beneficial when participants are getting enough sleep overall, but apportioning the total amount of sleep between daytime naps and nocturnal sleep.