I wake up between 6am and 7am, work through the morning, then take a 15-minute chair nap around noon. Back to work until , another short chair nap, then I stop around 6 or 7pm. After that: housework, dinner, painting, remodeling, mowing, a walk or jog. Around 11pm I go to bed, sleep for about 30 minutes to 1 hour, then get up around 11:30 and work again until 2 or 3am. Sunday I take multiple naps and do far less work.
I've had people tell me this schedule is unsustainable, even reckless. The science is more complicated than that, and the history is on my side in ways that surprised me.
Historian Roger Ekirch, PhD, spent decades documenting sleep patterns in preindustrial Western cultures. His research found that before the 18th century, biphasic sleep was the dominant pattern: most households went to bed between 9 and 10pm, slept a "first sleep" of about 3 to 3.5 hours, woke up after midnight for an hour or so, then took a "second sleep" until dawn. By the 1920s, that pattern had completely disappeared from the record.
The Industrial Revolution didn't just change work hours. It changed when and how people allowed themselves to sleep. Monophasic sleep, the single long block we treat as normal, is a historically recent artifact. One EEG case study cited by the Sleep Foundation even suggested that the midnight waking hour may be pre-programmed in humans at the neurological level.
My 11:30pm work session isn't a weird hack. It's structurally identical to the historical "wake period" between first and second sleep.
Biphasic sleep means two sleep periods within a 24-hour cycle. Polyphasic means more than two. My schedule has the two chair naps plus the fragmented nighttime block, so I'm technically polyphasic, not purely biphasic. I want to name that clearly because the research treats these differently, and the risks aren't identical.
The 2025 literature review published in ScienceDirect noted that there is "an unconscious modern cultural bias in sleep research against biphasic sleep," and called for more integrative work across historical, sociological, and physiological perspectives. That framing matters. But a recent meta-analysis from the National Sleep Foundation concluded that polyphasic sleep patterns can lead to sleep deficiency, circadian disruption, REM deficiency, and fragmentation. Both things are true simultaneously, and my schedule lives in the tension between them.
A 2006 study published by the Sleep Research Society found that 10-minute afternoon naps were the most effective duration, with measurable improvements in alertness and cognitive performance. A Progress in Brain Research systematic review confirmed that naps between 20 and 30 minutes produced cognitive improvements that lasted for several hours after waking. The NASA research is even more cited: a 26-minute nap improved pilot alertness by 54% and performance by 34%.
My 15-minute chair naps sit right in that window. More importantly, a 2024 randomized controlled crossover trial published in Frontiers in Sleep found that nap-chair rest produced an average of 19 minutes of actual sleep during a 30-minute rest period, and critically, deep slow-wave sleep (stage N3) was largely absent in both chair conditions. That's a benefit, not a limitation. N3 is where sleep inertia comes from. Waking out of slow-wave sleep causes grogginess, slowed reaction time, and impaired performance that can persist for up to two hours. The chair physically limits how deep you go, which means you get the alertness reset without the cognitive hangover.
The 4pm nap is the most questionable. Research on circadian biology is consistent: naps work best when they land near the natural afternoon alertness dip, which tends to peak earlier in the afternoon. A nap that drifts toward 4pm risks reducing sleep pressure enough to push back genuine sleepiness at bedtime, which could shorten or fragment the 11pm block.
The 11pm 30-minute bed nap is also in a complicated zone. Thirty minutes to one hour is long enough to enter light slow-wave sleep, which means waking at 11:30-midnight carries a real sleep inertia risk. The fact that I'm then starting a work session at that point isn't ideal timing from a performance standpoint.
Working from 1 to 3am is an adverse circadian phase. Cortisol and natural alertness are suppressed in that window. That doesn't mean I'm not productive, but it's worth noting that the body isn't optimized for output at that hour. However, I find that I do some of my best work during that quiet time.
Research in the Archives of Internal Medicine linked regular midday napping to a 37% lower coronary heart disease mortality risk in a large Greek cohort. Napping has real cardiovascular upside. But repeated nighttime awakenings raise cortisol, interfere with memory consolidation, and over the long term have been tied to higher rates of cardiovascular disease and metabolic problems including type 2 diabetes. I hold both of those findings at the same time.
The research on shift work recovery is straightforward: rest days following atypical sleep schedules are associated with longer sleep and are the body's primary mechanism for addressing accumulated sleep debt. Recovery from even a single night of total sleep deprivation typically takes one to two nights. Chronic restriction takes longer.
My Sunday is not me being lazy. It's a structured recovery anchor that keeps the rest of the week from compounding into something worse. The science supports it as a rational countermeasure, not a reward.
Experts recommend 7 to 9 hours of total sleep per 24 hours for most adults. If I add up my naps and my nighttime block, I'm not actually hitting that range across the week, or whether Sunday is compensating for a chronic shortfall. Research suggests that total sleep time and sleep continuity both matter independently. I can get the hours and still pay a cost for fragmentation.
I'm not going to tell you this schedule is safe or optimal. No controlled study has examined this specific pattern. I'm certain it will change eventually, but this is what works for me right now.
What I can say is that the history suggests humans slept in fragments long before anyone called it a problem.