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No one knows what a body can do

Nicolas Delon transforms the grueling, cliché-ridden world of ultramarathons into a profound meditation on human endurance, existential nausea, and the paradox of preparedness. Rather than delivering a standard race report, Delon uses his 31-hour ordeal at the Hellbender 100 to argue that the true test of a 100-mile run is not physical stamina, but the ability to navigate the collapse of meaning when the body fails.

The Architecture of Suffering

Delon begins by dismantling the trite mantras that saturate endurance culture, noting that while clichés like "trust the training" are often true, they "lack specificity and precision" and offer little actionable guidance when the mind is fracturing. He frames the 100-mile race not as a triumph of will, but as a brutal confrontation with the limits of human agency. The author describes the course as a "Sisyphean accumulation of gnarly hills," where the elevation gain rivals Mount Everest but lacks the romantic altitude of alpine peaks. This grounding in the mundane reality of the terrain makes his subsequent philosophical leaps more credible; he isn't speaking from an ivory tower, but from a stretcher in the mud.

No one knows what a body can do

He details the specific mechanics of failure, from the inability to keep down food to the cognitive decline that makes "simple math impossible." Delon writes, "The range of possible failures exceeds preparation." This observation is the essay's first major pivot: it suggests that no amount of training can fully inoculate an athlete against the chaos of the race. Critics might argue that this fatalism undermines the value of preparation, but Delon counters that the goal is not to prevent every disaster, but to build a framework for surviving the unexpected.

"Each race will be exactly the same in that each time will be different. But every race will itself be maddeningly repetitive: steps, hills, laps, out-and-backs, gels, refills, it's all the same all over again, except it's never the same."

The Paradox of Preparedness

The core of Delon's argument rests on what he terms the "paradox of preparedness." He acknowledges that while runners can train for hills and sleep deprivation, they cannot predict the specific combination of hallucinations, nausea, and despair that will strike. He illustrates this with his own experience at the Hellbender, where he felt like an "arrogant fool humiliated by the mountain gods" before finding a second wind. The author suggests that the only way to navigate this uncertainty is to accept that "expect the unexpected" is the only reliable strategy.

Delon's analysis of the psychological state of the runner is particularly sharp. He notes that feeling fast can actually make a runner faster, creating a "positive feedback loop" where the better one feels, the better one runs. However, he warns that feeling too good too early leads to burning out. This nuanced take on the psychology of endurance challenges the simplistic "no pain, no gain" narrative. As Delon puts it, "Feeling fast makes you fast. Fake it until you make it." This advice, usually reserved for corporate seminars, is reframed here as a survival mechanism for the human mind under extreme duress.

Tying Yourself to the Mast

Perhaps the most compelling section of the piece is Delon's application of Homer's Odyssey to ultrarunning. He draws a parallel between Odysseus tying himself to the mast to resist the Sirens and a runner instructing their support crew to ignore their mid-race pleas to quit. Delon explains that his wife has been given strict instructions: "my wife knows she is not supposed to let me quit, even if I tell her to." This creates a "commitment device" that overrides the compromised judgment of the suffering athlete.

The author argues that in the depths of suffering, a runner's rational faculties are hijacked by the "sirens of the DNF" (Did Not Finish). By pre-committing to a course of action, the runner bypasses the paralysis of choice. Delon writes, "Be like Ulysses, accept that you will be enchanted by the sirens of the DNF, but don't allow yourself to act on this particular mid-race preference." This framing elevates the race from a physical contest to a test of pre-rational commitment. It suggests that true freedom lies not in the ability to choose in the moment, but in the wisdom to bind oneself to a decision made when one was still whole.

"My trust in my wife's judgment becomes my commitment device. I metaphorically tied myself to the mast of her steadfastness so that the sirens of the aid station—'look at that chair!'—cannot work their magic."

The Existential Nausea

Delon concludes by weaving in Jean-Paul Sartre's concept of La Nausée, comparing the physical sensation of vomiting to the existential realization of the "facticity" of existence. He describes how nausea is not just a physical barrier but a philosophical one, where the trail becomes "sickeningly superfluous" and the body confronts the runner with its "brute facticity." This is the essay's most daring move: equating the desire to quit a race with the absurdity of life itself.

He suggests that the race acts as a microcosm of existence, where the runner is forced to confront the meaninglessness of their suffering. "The race makes you reflect, with sadness, disgust, and anguish, about your whole life," Delon writes. While some may find this comparison melodramatic, it effectively captures the totalizing nature of the experience. The nausea is not just about food; it is a visceral rejection of the entire endeavor. Delon notes that while pain can be overcome, nausea is a "major performance bottleneck" that feels like "existential despair befalling a radically free human."

Bottom Line

Delon's piece succeeds by refusing to treat ultrarunning as a mere athletic feat, instead exposing it as a raw encounter with the fragility of human meaning. The strongest element is his synthesis of physical struggle with existential philosophy, particularly the use of the "mast" metaphor to explain how we outsource our will to survive. The argument's vulnerability lies in its heavy reliance on the runner's internal monologue, which may feel inaccessible to those who have never faced such extreme physical limits, yet the universal themes of doubt and commitment ensure its resonance beyond the trail.

"The race makes you reflect, with sadness, disgust, and anguish, about your whole life."

The ultimate verdict is that Delon has written a rare piece of endurance literature that transcends the genre, offering a clear-eyed, unsentimental look at what it means to keep moving when the world has lost its reason.

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No one knows what a body can do

by Nicolas Delon · · Read full article

Here are some clichés you’ll hear at ultramarathons.

“It’s 90% mental and the other half is physical.”

“It’s not about the destination, it’s about the journey.”

“Find your why.”

“Start slow, then slow down”

“One mile at a time”

“Trust the training.”

“Dig deep.”

“Keep moving forward.”

“I’m never doing this again” (usually followed by signing up for another one)

“Type 2 fun” (miserable during, but fun in retrospect)

Most of them are rather trite. But many of them ring true because they are. The problem with clichés is not that they’re false (they’re often true in some sense) but that they lack specificity and precision, they’re riddled with exceptions, and usually provide little actionable information. Some of those, however, are worth chewing on. And so you are warned, I will be rehearsing some clichés in what follows.

The setting.

Last weekend, I started my sixth and completed my fourth 100-mile race, the Hellbender 100 near Old Fort, NC, which this year featured an alternate, and some say “easier,” course due to the devastation caused by Hurricane Helene last fall. The area was severely hit, and many of the trails are still closed. This alternate course did not look, at least on paper, as exciting as the original course. We did not ascend Mount Mitchell, for instance, the highest point east of the Mississippi. And we repeated some sections more than a beautiful loop course typically allows. Still, this was a challenging course (the repetition frankly didn’t help) with its own charms.

This essay is not a race report, breaking down the race section by section as well as covering training and race prep. It’s an art to write those well; most of them I find boring to read, so writing one, I can’t imagine. What I want to do instead is mull over some things I’ve learned running 100-milers.

What is a one-hundred-miler? It is a one-hundred-mile footrace! You have to complete the distance in as little time as possible, powered only by your own feet. Some will be a tad longer (Cruel Jewel, for instance, which I completed twice and quit once, hovers around 103-105 miles). Your GPS watch may record more or less than exactly 100 miles. But typically, that’s what the race distance is supposed to be. One hundred miles, or 160.9 kilometers. However, the most significant variation is terrain. You’ll find trail races, like those ...