Biphasic sleep is a sleep schedule that involves two periods of sleep over 24 hours, which is often sleep at night plus a nap. Monophasic sleep is a schedule that involves one period of sleep, and ...
“During a night shift that, for example, lasts from 4pm to 9am the next morning, a split nap of 90 minutes and 30 minutes, ending at 12am and 3am, respectively, is thought to be more effective than a ...