@cowtan I've gone stretches of sleeping a normal 24, but like your son, it was very easy to knock me off.
Even when I managed, I had incredible daytime sleepiness. I did a lot of napping. It didn't matter how many hours I got at night, I could either be barely awake on a full night's sleep or wide awake on 3 hours.
I was a student and worked a traditional job when I was following a 24 cycle so napping wasn't easy. I slept anywhere I could... face down over my arms in a coffeeshop, on a strip of grass, in class, in my car, under my desk at work.
Now that I attempt to follow a 26 hours schedule, I rarely nap, but it's not always easy to know what the schedule is once you have to deviate from it for more than a couple of days because it's hard to know when you're perfectly on schedule. I can be 8 hours off, but by sleeping 2 hours later each day, it's still tenable. It'd be like a normal person training to sleep at 6pm or 6am daily, except I don't know what time my body thinks it is.
#Non24