Naps are acceptable if they do not disrupt nighttime sleep and are taken early enough in the day.

“it's perfectly normal to require anywhere from a 10 minute to a 90 minute nap in the afternoon for some people if you're not a napper no big deal it's known that naps can disrupt nighttime sleep but provided that they're early enough in the day if you take a nap and you are still able to fall asleep at night then naps are fine for you if you're somebody who doesn't like naps because you wake up groggy or grumpy which often happens to certain people then don't nap you certainly do not need to nap but if you're feeling energetic throughout the day chances are you're getting enough sleep at night”