When I backpacked the Pacific Crest Trail I lived on the trail for 2 3-month time periods. I slept from dusk to dawn. I slept on a little foam on the ground so we're not talking comfort here. I slept really well, unless there was a moon out or I had a little insomnia or it was too cold for my gear. It taught me a lot. I learned that it is normal and healthy to sleep from dusk to dawn, that insomnia just happens sometimes and it's no need for concern, that birds will be fooled by the moon into thinking it is daytime and they will sing sometimes at night. I also learned it is very hard to take a nap in the woods. It's hard to sleep with ants crawling up your pants and you can forget napping when there are mosquitoes. Other napping challenges included extreme heat, desert bugs I mistook for rattlesnakes going off all around me, swarms of bees interrupting my attempts at napping. I'm just not so sure that in all parts of the world polyphasic sleep actually works.
Female, 5'3", 50, Max squat: 202.5lbs. Max deadlift: 225 x 3.