Napping earlier in the day, rather than later, may prevent sleep onset difficulties in the evening and reduce nighttime awakenings by preserving sleepiness.

“the later that you nap if your sleep becomes either a more difficult to initiate in the evening or maybe you don't have any problems falling asleep but for some reason when I look back I'm now starting to wake up more throughout the night that in part again it's not just that if you nap late in the day you struggle to fall asleep you may not the other consequence that can happen which is non-mutually exclusive is that you then stay in not as deep as sleep and your sleep is more some more fragile in that sense so the probability that you will wake up because because you had the nap so late in the day is higher in the middle of the night”