A sleep replacement nap, allowing for a full sleep cycle, can serve as a substitute for nighttime sleep.

“During the day, it might take two to three hours to make it all the way through because you're not expecting it.”

“Sort of like a meal replacement shake where no one looks at that and thinks that that looks like a meal. Uh, no one's confused that it's really a meal, but it does the trick in a pinch. And what a sleep replacement nap is, athletes do this, too, when they um uh especially when they have late games and they have to wake up in the morning. College students do this one all the time where you go through a full cycle. you actually make it all and you get all you get a whole cycle of deep sleep, which does exactly what it does at night, too.”