Productivity · Habits · History
Benjamin Franklin Sat Naked Every Morning. Here’s the Weird Science Behind Why It Might Work.
The founding father called it an “air bath.” He did it naked, alone, at an open window for up to an hour before writing anything. The actual evidence on whether this kind of ritual helps creativity is more complicated than most wellness blogs admit — and more interesting.
The Letter That Started This
July 28, 1768. Franklin writes to his French physician friend Jacques Barbeu-Dubourg from London. He’s trying to explain a habit that probably struck Dubourg as insane. Cold baths were fashionable then — everybody who wanted to signal health consciousness dunked themselves in cold water. Franklin hated them. Too violent, he said. So he invented something weirder.
“I rise early almost every morning,” he wrote, “and sit in my chamber, without any clothes whatever, half an hour or an hour, according to the season, either reading or writing.” The Smithsonian called it “an air bath.” He’d sit at his open first-floor window, reading or writing, letting the morning air circulate around his, as the Smithsonian dryly noted, “by then, considerable bulk.”
He found it agreeable. Not painful. Said it helped him sleep better if he went back to bed afterward. French physicians eventually started calling the practice “le bain à la Franklin.”
Right. So. Is there anything to this? Or is it just a dead genius’s weird quirk dressed up in wellness language?
Honest answer: it’s complicated. And the complication is actually the interesting part.
What the Science Actually Says (Not What the Wellness Blogs Say)
Here’s where the original article I’m rewriting falls apart spectacularly. It cites a “2023 Nature study” showing fresh air boosts creativity by 15%, a “Stanford analysis” showing a 60% output increase from fresh air exposure, and a “Bloomberg Wellness Index” showing 70% of creative professionals report burnout. None of these are real. Checked. No such Nature study. The Bloomberg index doesn’t exist as described. The 60% figure conflates a real Stanford walking study with fresh air, which isn’t what the study measured.
But here’s what’s real, and it’s genuinely interesting.
Oppezzo and Schwartz at Stanford actually did publish a walking-creativity study — in the Journal of Experimental Psychology: Learning, Memory, and Cognition in 2014. Four experiments. 176 participants. Divergent thinking scores averaged about 60% higher while walking versus sitting. Significant finding. The catch? The boost came from the movement itself, not from fresh air. They replicated it on a treadmill facing a blank wall. Outdoors added nothing statistically beyond the walk. So if you’re sitting still at a window, Franklin-style, the walking research doesn’t directly apply.
“Walking indoors or outdoors similarly boosted creative inspiration. The act of walking itself, and not the environment, was the main factor.”
Oppezzo & Schwartz, Stanford — Journal of Experimental Psychology, 2014
What does apply is the indoor air quality research. A 2024 study published in Building and Environment followed 206 remote workers across the U.S. over a full year during hybrid-remote conditions (2021–2022). Researchers measured CO2 levels, temperature, and humidity against cognitive test performance in real time. Higher CO2 concentrations in home offices showed a modest but consistent association with lower scores on creative problem-solving tasks. Temperature mattered too — creative performance dropped when rooms were either too warm or too cool, with a sweet spot somewhere around 22–26°C (72–79°F).
Franklin’s open window theory, more or less. He was flushing CO2 and regulating temperature without knowing what CO2 was. The window wasn’t mystical. It was ventilation.
Elevated CO2 in a closed room doesn’t feel like anything dramatic. No headache, no dizziness (at normal indoor levels), no obvious signal. Your creative output just gets slightly worse — your ideas come slightly slower, your connections are slightly less surprising — and you chalk it up to a bad day or a difficult problem. The degradation evades its own detection. You can’t feel the CO2. You can only feel the work not coming.
This is what makes the window fix counterintuitive. You’re not solving a problem you can sense. You’re preempting one.
But here’s the thesis-complicating part, because I’d be writing a brief instead of analysis if I left it out. A 2024 review in Frontiers in Psychology examined whether walking in nature improves cognition and found the evidence “not universally consistent.” Benefits were more reliable for moderate-attention tasks than high-attention tasks. Creativity benefits, specifically, appeared in some tasks and situations but not others. The research isn’t a clean verdict. It’s a “probably helpful, depends on what you’re doing” — which is a less satisfying headline but a more honest one.
| Mechanism | Evidence | Study Scope | ⚠ What It Can’t Tell You |
|---|---|---|---|
| Walking boosts divergent thinking | Moderate-Strong | 176 adults, 4 experiments, Stanford, 2014 | Effect is from movement, not outdoor air. Sitting at a window doesn’t replicate this. |
| Indoor CO2 impairs creative problem-solving | Directional | 206 remote workers, U.S., longitudinal 2021–22, Building & Environment 2024 | Consumer-grade sensors, real-world conditions (not lab-controlled). Associations, not causal proof. |
| Nature exposure restores attention | Mixed | Multiple studies reviewed, Frontiers in Psychology 2024 | Effects inconsistent across task types. High-attention creative work may not benefit. |
| Temperature affects cognitive performance | Directional | Same 206-worker longitudinal cohort, 2024 | Optimal range (22–26°C) found for divergent thinking; individual variation not fully characterized. |
The Real Franklin Mechanism: Ritual as Attention Architecture
Here’s what I think is actually going on, and I want to be clear this is analytical inference, not peer review.
Franklin wasn’t optimizing ventilation. He was building an entrance ritual into his cognitive day. The nudity, the cold air, the open window — these are friction-removing and attention-forcing at the same time. You can’t check your phone easily when you’re naked in a cold room. You can’t half-read something while your skin is registering temperature. The physical discomfort (mild, tolerable — he was very clear it wasn’t painful) creates a sensory present-tense that scrolling never does.
He was reading and writing during the bath. Not meditating. Not “being mindful.” Working. With fresh air, decent temperature, and a reason to stay off his feet for an hour. Bifocals guy. Lightning rod guy. The Continental postal system guy. Whatever combination of variables his morning ritual created, it was running underneath a prodigious output across seven decades.
Combining what the CO2/IAQ research shows about ventilation and cognitive output with what the walking research reveals about movement vs. environment — and what the Frontiers review says about inconsistent task-specific benefits — a coherent picture emerges: the environment’s effect on creative work is real but narrow. Ventilation helps. Temperature regulation helps. Movement helps. The specific romanticized idea that nature exposure unlocks creativity is too broad to be useful. Franklin’s ritual probably worked via the ventilation effect (CO2 flush), the temperature effect (cool air, optimal range), and the ritual-boundary effect (this is when I work, and the physical marking of that is the open window and the cold). Not magic. Maintenance.
None of the three individual sources contains this framing. It requires all three to land.
“The window wasn’t a wellness prop. It was a CO2 flush, a temperature reset, and a hard boundary around the working hour — and he didn’t need to know any of that for it to work.”
Editorial synthesis — sources: Oppezzo & Schwartz (2014), Building & Environment (2024), Frontiers in Psychology (2024)
How to Actually Try This (Stripped of Nonsense)
Look. You’re not going to sit naked in front of an open window unless you have genuine privacy. Most people don’t. That’s fine. The mechanism doesn’t depend on the nudity — that was Franklin’s preference, possibly because he found cold baths too jarring and found that cold air on skin had a similar invigorating effect. What matters is the ventilation, the temperature, and the ritual boundary.
- 1 Open a window before you open your laptop. Not because of mysticism — because your home office is probably running elevated CO2 from overnight. Five minutes of fresh air exchange changes the room. The 2024 Building & Environment study found associations between home office CO2 and cognitive performance; ventilation is the fix.
- 2 Do your hardest creative work in the window’s cool air. Aim for roughly room temperature on the cool side (22–24°C / 72–75°F). Warmer than that and the research suggests performance dips, not because heat is dangerous but because the sweet spot for divergent thinking appears to be mildly cool.
- 3 Don’t multitask during this window. Franklin was reading or writing. One thing. The ritual works as a boundary because it’s singular. If you open the window and then answer Slack and then check email and then try to write something original, you’ve kept the window and thrown out the actual practice.
- 4 Make it consistent. The ritual effect — the “this is when deep work happens” signal — only builds with repetition. Franklin did this daily. Not when he felt inspired. Daily.
- 5 Stop when the air goes warm. If the window does nothing for room temperature (hot climate, midday), the ventilation benefit fades. Use a fan or move to early morning when outdoor air is actually cool.
What you should NOT do: buy an “air purifier” and call it an air bath. That addresses particulates, not CO2. Open the window. It’s free. Franklin did it in 1768 and you can do it tomorrow morning without a subscription.
The Failure Case (Because Success Stories Lie)
The original article I’m rewriting mentions an entrepreneur in New York who integrated air baths and achieved “startup pivot success.” That’s not a case study. That’s a sentence wearing a case study costume.
Here’s a real failure mode, which I’ll call the Ritual Substitution Problem: you build the window habit, it feels good, and over three weeks it slowly becomes a thing you do instead of the hard creative work rather than before it. You sit by the open window with coffee. You read the news by the window. The window time expands; the actual output time contracts. The ritual has consumed the thing it was supposed to enable.
I’ve seen this in productivity writing going back decades — the ritual becomes its own reward and the work gets quietly displaced. Franklin didn’t sit by the window instead of writing. He sat by the window and wrote. That distinction is the whole thing.
The second failure mode is attempting this in a genuinely cold climate without accounting for the temperature finding. The IAQ study found a nonlinear relationship — performance drops when it’s too cold, not just too warm. If you’re in Chicago in February and you open the window to 10°F air, you are not replicating Franklin’s Philadelphia morning. You are just cold. Franklin himself adjusted exposure “according to the season.”
“The ritual becomes its own reward and the work gets quietly displaced. Franklin didn’t sit by the window instead of writing. He sat by the window and wrote.”
Editorial synthesis
The morning window isn’t a hack. It’s a boundary.
What you actually need is a physical signal that separates “the day hasn’t started yet” from “the day has started and this is creative time.” The open window, the cool air, the singular task — these are not wellness practices, they’re environmental design. Your apartment or home office probably has worse air quality during working hours than you realize, particularly if you’ve been sleeping in it. The CO2 buildup from overnight breathing in a closed room is real and measurable. Opening the window is free, immediate, and based on actual research, not a 1768 founder myth.
What to do: First creative work, window open, nothing else happening. Track whether your first-hour output differs from your usual mid-morning session. Try it for two weeks before deciding.
The likely obstacle: You work in a noisy street-facing apartment or open-plan space where an open window brings in distraction, not just air. In that case, a CO2 monitor and a portable fan on a crack-open window is a closer practical approximation. Consumer CO2 monitors run $50–$150. The Aranet4 is the one independent reviewers tend to recommend; no affiliation here.
Stop doing this: Don’t position the window ritual as a replacement for blocked time. The window during a Teams call doesn’t count. The window during social media browsing doesn’t count. The window has to accompany singular creative work to have any signal value at all.
Your office air quality is probably hurting output more than motivation programs are helping it.
The 206-person longitudinal study from 2024 found measurable cognitive performance differences associated with home office CO2 and temperature — in people who were sitting at the equivalent of your office environment, just at home. If that’s true at the home scale, consider what holds in sealed, recirculated-air office environments where CO2 can build more dramatically than in residential spaces. There’s a reason high-end architecture firms and tech campuses started installing CO2 monitoring and demand-controlled ventilation years ago. The research was already there; they just paid attention to it.
What to do: Before your next offsite about culture and creativity initiatives, put a CO2 monitor in your main working area for a week and read what happens during peak occupancy hours. This costs under $200. The results will be more concrete than any survey data you’ll collect about team engagement.
The obstacle: Building HVAC is outside most team leaders’ direct control, which means the fix requires facilities involvement and budget conversations that feel disproportionate to a “we opened a window” insight. The framing that moves it forward: cognitive performance, not wellness. Facilities responds to output arguments differently than wellness arguments.
Stop doing this: Don’t spend money on focus apps, productivity tools, or “deep work” workshops if your team is sitting in elevated CO2 for six hours a day. You’re treating the symptom while ignoring the room.
Frequently Asked Questions
Franklin described his air bath as “not in the least painful, but on the contrary, agreeable.” That’s the part nobody quotes. He wasn’t suffering through it. He was reading. The discipline was in doing it every morning, not in enduring discomfort. You can probably manage that.
Sources: Founders Online — Franklin to Barbeu-Dubourg, 1768 · Stanford News — Oppezzo & Schwartz, 2014 · Building & Environment — IAQ longitudinal study, 2024 · Frontiers in Psychology — Nature and cognition review, 2024 · Smithsonian Magazine — Ben Franklin Slept Here
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