"but if you're getting sufficient amounts of quality sleep at night" Ideally yes. But there are times that even with the best intentions that can't be done. An

"but if you're getting sufficient amounts of quality sleep at night" Ideally yes. But there are times that even with the best intentions that can't be done. Anxiety, sickness, some important schedule issue. Maybe a big lunch that you shouldn't have eaten. Naps work very well for rejuvenation.