What is misogi: the once-a-year challenge

There is a waterfall in Kagawa Prefecture where a man in a white robe stands beneath cold water at six in the morning, and there is a man in Atlanta who runs fifty kilometers once a year and calls that the same thing.

So what is misogi? It is a Japanese Shinto purification ritual that involves immersing oneself in cold natural water, most often a waterfall, to mark a threshold and renew one's sense of clarity. In the last decade Americans like Jesse Itzler have adapted the word to mean a once-a-year challenge designed with a 50 percent chance of failure. Both meanings are useful; the gap between them matters.

Skip to:

• What misogi originally is: the Shinto ritual, the waterfalls, the millennium of practice
• The Jesse Itzler reframe: how Marcus Elliott and Itzler built the American version
• Why the once-a-year cadence matters: the recalibration argument
• What a misogi actually does psychologically: the 9-15 month memory effect
• Common mid-life misogis people actually do: six categories with concrete examples
• How to pick yours: the 50 percent rule applied honestly
• What it does NOT solve: the limits of an annual event

What misogi originally is

The word in Japanese is 禊. The water-based form has its own technical term, mizugori (水垢離), which is what you would say if you wanted to be precise about the practice of standing under a waterfall in winter. Misogi is the broader category. It is a purification ritual within Shinto, and the most photographed version is the one where practitioners in white shiroshōzoku robes wade into cold rivers or stand beneath a falling column of water, sometimes for several minutes, chanting harae prayers.

The Tsubaki Grand Shrine in Mie Prefecture has run public misogi training for decades and is the place most Western practitioners have heard of, partly because its former chief priest Yukitaka Yamamoto worked extensively with American Shinto students from the 1960s onward and opened a branch shrine in Washington State. The Misogi Festival there happens each July. In Kagawa Prefecture, the Konpira mountain practices have been performed in some recognizable form since at least the late Heian period. Kotaki Falls in Nagano is another well-known site. There are hundreds of others.

The point of the ritual is purification before something else. A wedding. A new year. A change of office. A funeral. The misogi is the gate; the important thing is whatever comes after the gate. Across the Shinto and Daoist traditions, purification rituals operate on the logic of liminality, you move into an in-between space, get cleaned, and step out the other side as a person properly equipped for what comes next. The Encyclopedia of Shinto, maintained by Kokugakuin University in Tokyo, lists misogi as one of the four main forms of harae (purification), alongside ōharae, imi, and kessai.

A few things this is not. It is not an athletic challenge. The cold water is uncomfortable, but the goal is not to suffer through it impressively or to set a personal record for endurance under falling water. Several priests have been frustrated by the Western reading of misogi as a kind of macho cold-immersion training; the Wim Hof framing, the Goggins framing, the polar-bear-plunge framing are all foreign to what the ritual is actually doing. The cold is part of the symbolism of being made clean, the way water is in baptismal traditions. The intensity is incidental.

It is also old. The Engishiki, a tenth-century compilation of ceremonial protocols, codifies misogi practices that were already understood as ancient when they were written down. So when an American hedge-fund alumnus talks about his annual misogi, the word he is using has been in continuous ritual use in Japan for at least a thousand years. That is worth holding in mind.

The Jesse Itzler reframe

In the mid-2010s, Jesse Itzler, a former rapper, the co-founder of Marquis Jet, husband of Sara Blakely, began writing and talking publicly about an annual practice he and a small group of friends had been doing for about a decade. He called it misogi. He had picked up the word from Marcus Elliott, a Harvard-trained physician who runs the Peak Performance Project (P3) in Santa Barbara, a sports-science lab that works with NBA and NFL athletes.

Elliott had been doing his own version for years. The lineage of how he came to use the Japanese word is described in Michael Easter's book The Comfort Crisis (2021), which gave the Itzler/Elliott reading of misogi its biggest popular audience. Easter does the reader the favor of acknowledging that the American misogi is a borrowing, not a continuation. He went to Japan, spoke with priests, and reported back that the Shinto version and the Itzler version share a word and very little else.

The American misogi has three rules, as Itzler describes them on his podcast Build Your Life Resume and across his interviews:

1. You design it to have roughly a 50 percent chance of failure.
2. You can't die. (Real rule. Has to be said.)
3. You don't talk about it afterward, except with the people who did it with you.

The 50 percent rule is Elliott's. He arrived at it through training-load logic, if the chance of failure is much lower, the recalibration effect collapses; if it is much higher, the event becomes statistically meaningless. Fifty percent is the threshold where the body and the brain take the event seriously. The achievement framing is American. So is the no-talking rule, which functions partly as anti-performance instruction and partly as a protection against the social-media flattening that has happened to almost every other interesting practice.

What the American misogi borrows from Shinto: the annual cadence, the threshold-marking, the deliberate-difficulty as a way to mark off ordinary time from a moment of intentional rupture. What it adds: the achievement structure, the failure rate, the suppression of audience.

These are different words doing different work. The Shinto practitioner is being purified for what comes next; the American is recalibrating his sense of what counts as hard. The first is a religious act inside a continuous tradition. The second is a secular performance practice that uses the Japanese word as a kind of credential, a way of saying this is serious, this is older than me, this is not a stunt. Whether the borrowing is respectful or appropriative is a separate question, and depends on the specific borrower. Itzler has been mostly careful about saying he is doing something different than what Japanese priests do. The broader fitness-influencer adoption of the word has been less careful.

The thing to keep clear in your own head: when you read about an American misogi, you are reading about the Itzler-Elliott reframe, which is roughly ten years old. When you read about misogi in a religious-studies context, you are reading about a Shinto ritual roughly a thousand years old. The English-language internet often conflates them. Don't.

Why the once-a-year cadence matters

Itzler's argument, made repeatedly across his interviews and writing, is that you do exactly one misogi per year. Not two. Not one every quarter. One. The reasoning is that the event's psychological power comes from its rarity, and adding more dilutes it.

This sounds like a marketing constraint and turns out to be load-bearing.

Andy Walshe, who ran Red Bull's high-performance program for over a decade and was the architect of Red Bull Project Acheron, a multi-day ordeal-event for elite performers across fields, has talked at length about the same dynamic. Walshe's argument is that a true peak-ordeal event recalibrates the nervous system's internal baseline for what threat and difficulty feel like. If you stack ordeal events too closely together, the system adapts. You build capacity, which is useful, and you stop getting the recalibration. The threshold becomes the new normal.

There is a parallel here with rite-of-passage literature. Arnold van Gennep's Les Rites de Passage (1909), still the foundational text in the field, describes the three-part structure of separation, liminality, and reincorporation. The rite works because it is bounded. A coming-of-age ritual that you did twice a year would not be a coming-of-age ritual; it would be a regular feature of the calendar. Victor Turner, building on van Gennep in the 1960s, made the same point more emphatically: the liminal phase is the engine, and liminality is by definition exceptional.

Compare with weekly hard workouts. A weekly threshold run, a weekly heavy squat day, a weekly cold plunge, these are excellent for building physical capacity. Sustained, they make you measurably more durable and capable. What they do not do is rewrite your internal sense of what "hard" means. The body adapts in weeks. The brain, given regular hard input, decides hard is now the floor.

The misogi rewrites the floor. That is the claim, and the evidence for it is mostly testimonial: Itzler, the people on his podcasts, Easter's reporting, Walshe's observations. There is not yet a developed academic literature on once-a-year ordeal events as a category, in part because the population doing them is small and self-selected. The testimony is consistent, though. A person who has spent twelve hours in cold open water in the previous calendar year does, when asked, describe the rest of the year differently.

The cadence point is also why "misogi season" is mostly fictional. Itzler does his in the spring; Easter has done his in different seasons; Marcus Elliott has done desert ones, ocean ones, mountain ones. The when is open. The how-often is closed.

What a misogi actually does psychologically

Capability recalibration is the technical-sounding term. The plain version: after the event, your sense of what counts as hard moves.

A board meeting that would have spiked your heart rate in March, in October, after you have run fifty kilometers in the Sierras in July, registers as a board meeting. A difficult email is a difficult email. The category of difficult has been recalibrated against the memory of an event large enough to function as a reference scale.

People who have done one tend to report referencing it for somewhere between nine and fifteen months. This is anecdotal, Itzler talks about it, the people in his orbit talk about it, Easter's reporting in The Comfort Crisis describes the same window. After that, the memory loses its corrective power and you need another event. Which is one of the strongest practical arguments for the annual cadence: you are not doing this once. You are doing it every year, because the effect decays.

There is a Stoic precedent here that is worth surfacing because it cleans up some confusion about what the practice is doing. Seneca, in Epistulae Morales (Letter 18 in particular), recommends premeditatio malorum, the deliberate rehearsal of misfortune. He suggests setting aside several days each month to live on a pauper's diet and sleep on a hard mat, in order to make actual poverty less terrifying if it ever arrived. The misogi is the action version of this. You do not rehearse hardship in imagination; you produce a real instance of it on a schedule.

The psychological mechanism is the same. By voluntarily generating a memory of having survived something hard, you change the reference distribution for what hard looks like. Tim Ferriss has written about a related practice, what he calls "fear-setting", which adapts Seneca's letters directly. The misogi sits in the same family.

What separates misogi from related practices is the scope. Premeditatio malorum is a daily or weekly hygiene practice. A cold plunge before work is a daily hygiene practice. A misogi is annual, large, and singular. The size is the point. Researchers who study peak experiences, Mihaly Csikszentmihalyi's body of work on flow is the most familiar reference, but Abraham Maslow's earlier work on peak experiences in Religions, Values, and Peak-Experiences (1964) is more directly relevant here, describe certain rare and intense events as forming durable autobiographical landmarks. You remember them differently than you remember regular life. The misogi is an attempt to manufacture one on purpose.

This is also why misogi is different from endurance training. An endurance athlete will run a 50K and then run another one six weeks later. A misogi-doer runs the 50K once and then doesn't run a 50K again. The first person is building capacity; the second is constructing a memory. These are different goals and produce different effects.

Common mid-life misogis people actually do

The form is open. The 50 percent rule is the diagnostic. Here are concrete categories with concrete examples; pick none of them and design your own.

Endurance. A 50K trail run on terrain that exceeds your training. A 24-hour mountain-bike race. A Channel-crossing swim attempt (the English Channel has roughly a 35-45 percent completion rate among trained attempters, which sits in the misogi band). A century ride with significant elevation when your longest training ride was 60 miles.

Skill acquisition. Learning a language to a defensible conversational level in twelve months from zero. Certifying as an EMT or a wilderness first responder. Performing a thirty-minute piece on an instrument you do not currently play. Passing a difficult professional exam adjacent to your field.

Social and emotional. A thirty-day silent meditation retreat at a Vipassana center, where talking, reading, and writing are forbidden and a meaningful percentage of participants leave early. A solo wilderness multi-day, three to seven days alone without electronics. A deliberate in-person reconnection with someone you have hurt or who has hurt you. A public-speaking event at a scale that frightens you.

Wilderness and exposure. Climbing a peak that requires technical skill you currently lack and will need to acquire. Bikepacking a route at a scale that exceeds your prior experience.

Cold and water. An open-water swim across a cold lake. Following the actual Shinto practice at Tsubaki Grand Shrine, with the awareness that you are participating in a religious ritual and behaving accordingly.

Creative. Writing a book draft in a year when you have never written one. Producing and releasing an album of music. Mounting a one-person show at a real venue.

The categories are porous. The point is the design: something large enough that a thoughtful friend would put real money on you not finishing. The 50 percent rule is honest. Most people pick something they will almost certainly complete and call it a misogi. That is a project. A misogi is the one you might not finish.

How to pick yours

Apply the rule honestly. The cleanest version of the test: describe what you are planning to a close friend who knows your fitness, skills, and history. If they say "yeah, you'll be fine," it is not a misogi. If they say "I have no idea if you'll finish that," you are in the band.

This is harder than it sounds. The reason most "misogis" people describe online are actually projects is that humans are bad at calibrating against their own ability. We over-estimate things that look extreme and under-estimate things adjacent to what we already do. A non-runner thinking about a marathon is in a different epistemic state than a marathoner thinking about a 50-miler. The marathoner's "scary" event might be the 50-miler. The non-runner's might be a half. The 50 percent rule is personal and only meaningful relative to your actual starting point. Scope to where you are, not to the audacious internet version.

The no-talking rule is the second-hardest constraint. Itzler is insistent on it, and the reason is sound: the moment you start posting about your training, the misogi has acquired an audience, and an audience changes the practice. You become accountable to the audience's expectations rather than to your own. You start training for the post. The discipline is to do the thing without anyone outside your immediate group knowing it is happening.

This includes, especially, Strava, Instagram, your podcast, your LinkedIn. The people you train with know. Your spouse knows. A coach if you have one knows. That is the list. After it is over, you can mention it to friends; the practice is not secret. During and in the lead-up, it is private. The constraint sounds fussy. It is load-bearing.

The safety floor is the third constraint and the one fitness-internet least respects. Itzler's second rule, you can't die, is a real rule, not a joke. Misogi is not stunt. The point is recalibration through completion, not glory through risk. You train. You prepare. You bring qualified people if the event has any technical or medical exposure. You pick something at the upper edge of your honest capacity, not past it. If the event involves cold water, you have safety personnel. If it involves altitude, you acclimatize. If it involves a long solo, you have a check-in system. The 50 percent rule applies to whether you will complete it, not to whether you will survive it. These are different distributions.

The last thing to say about picking. You do not need to do this. The misogi practice is not obligatory and is not the only path to mid-life recalibration. People build meaningful lives without it. People also build meaningful lives without ikigai, without Stoicism, without therapy, without any of the frameworks. The misogi is a particular tool that does a particular thing. If the tool fits the moment you are in, use it. If it does not, don't manufacture a reason.

What it does NOT solve

Misogi is not therapy. If you are depressed, anxious in a clinical sense, or working through trauma, the misogi will not address that. It might give you a temporary sense of agency, which feels useful in the moment, and the underlying conditions are not affected by an annual ordeal event. Get the therapy.

Misogi is not a career fix. If your work is wrong, wrong company, wrong field, wrong scope, running fifty kilometers in July will not change Monday morning in September. You will be the same person at the same job, with a new and impressive memory. The career conversation has to happen separately.

Misogi is not a relationship fix. A marriage that is failing will not be repaired by your spouse seeing you complete something hard. The opposite, in some cases, your spouse may experience the misogi as further evidence that you are looking for ways to be elsewhere. The relationship work happens at the kitchen table.

Misogi is not a substitute for the daily practice that the other 364 days do. Reading, lifting, writing, attention to your people, the slow accretion of skill, these do the actual building of a life. The misogi is one day. It does one specific thing. It rewrites your sense of hard.

This matters because there is an industry built around the suggestion that an extreme annual event will fix what is structurally broken in your life. David Goggins's body of work, which is excellent in its own register, has been adopted by readers who use it to avoid the slower and harder work of changing their actual circumstances. The Itzler material has been similarly adopted in places. The implicit promise is that if you suffer hard enough on purpose, the rest of your life will resolve. It does not.

What the misogi does, on its own terms, is real and limited. After your annual event, the things you previously called hard get called by other names. Your floor moves. Your capacity to tolerate ordinary friction expands, because you have a recent memory of much larger friction. That is the entire effect. It is worth doing for that effect. It is not worth doing while imagining it will do anything else.

In Kagawa, the man under the waterfall finishes his ten minutes, climbs out, dries off, and goes to work. The American doing his version drives home from the trailhead, sleeps for fourteen hours, and on Monday opens his email. Neither has been transformed. Both have been, for a moment, returned to themselves.

Until next April.