- Psychology researchers performed a study with 16 subjects, each restricted to 5 hours of sleep at night. The subjects were split into 4 groups – no nap, 30-s nap, 90-s nap, and 10-min nap. Subjects that took naps for 90 seconds or less were not found to perform any better on alertness and cognitive tasks. However, subjects that took a 10 minute nap significantly improve performance in multiple post-nap tests. This seems to suggest that only stage 2 sleep helps you recuperate from lack of nocturnal sleep.
Not being productive? Maybe a nap is what you need
I see stuff like this as more evidence that managers should rethink their in-the-desk-from-9-to-5 mentality: