Rolling as play

Grappling borrows the vocabulary of play. A person working from the bottom plays guard, a person who prefers to be there is a guard player, and what anybody does on the mat is their game. An article on the Evolve MMA blog from April 2020 is titled Guard Passers vs Guard Players, and describes a choice between "passing the guard or playing it". That is one blog, and it shows only that the usage exists.

This piece takes the word seriously. It reports a classic definition of play as one overview gives it, and what research on animals says keeps a play fight going. Then it sets beside them the pages on which rooms say what a training round is. The last section is our argument, labelled as ours. Our piece on flow covers the flow roll. This one is about the ordinary round, in which both people are trying. Nothing here is advice, and nothing here is a claim about anybody's development, health or state of mind.

Johan Huizinga's Homo Ludens was first published in 1938. We did not read it. What follows is the account given by Thomas Henricks in an overview of play scholarship in the American Journal of Play in 2008.

Henricks calls the book's best known element its statement of five defining characteristics. Play is relatively free or voluntary, with people setting the terms and timing of their own involvement. It is "distinguished from routine affairs by its absence of material consequences". It is separated from other activities by its own rules, spaces, ideas of time, costumes and equipment. It honours rules and yet encourages transgression and disorder. And it bands its participants together in societies of their own.

Huizinga, Henricks writes, was interested in the play of adults, and his work focuses almost exclusively on the social contest. He is not uncritical: he calls Huizinga's examples "somewhat specialized and even controversial".

A sparring round is a contest between adults, entered voluntarily, under rules, with nothing material resting on the result. That is our reading of a summary, and it proves little: Henricks's own opening list of play runs from throwing snowballs to doing a crossword puzzle. The better question is what keeps such a contest from becoming a fight.

The closest research is about animals. Sergio Pellis and Vivien Pellis, of the University of Lethbridge, study play fighting. Their 2017 review in Learning and Behavior, and a 2024 review with Jackson Ham in Frontiers in Ethology, describe it as competition for an advantage, such as biting a partner without being bitten. In the 2017 wording, play fighting "is characterized by competition that is curtailed by cooperation that enables role reversals". The 2024 abstract is shorter: "restrained competition seems to be its hallmark".

The first attempt to describe that cooperation, they write, was a 50:50 rule, under which partners must have equal chances of gaining the advantage. Later studies found that play fighting can be substantially asymmetrical and still remain playful, though not if one partner completely dominates. The 2024 review says that completely one-sided play relationships are unstable and that "some reciprocity, even if uneven, is needed to sustain playfulness". A 2022 article by the same group, on rats, adds that partners risk being "ostracized if they play too roughly".

The cooperation does not remove the contest. In juvenile rats, the 2017 review reports, counterattacks occur in about 45 per cent of encounters and role reversals in about 25 to 30 per cent, which the authors read as partners both helping and blocking each other. Their conclusion is that play fighting needs some cooperation to remain playful, and needs the competition too.

The 2017 review sorts the restraint into three strategies. The first is headed "Self-handicap oneself while executing combat tactics", and rats are the example. A play fight often leaves one rat on its back with the other standing over it. Usually the rat on top keeps its hind paws on the ground. Sometimes it stands on its partner with all four paws. According to the 2024 review, a counterattack from the bottom succeeds about 30 per cent of the time against an anchored partner and over 70 per cent against an unanchored one. In the 2017 review's words, "the animal in the advantageous position may relax its guard, giving its partner an opportunity to successfully reverse roles".

The second strategy is to fight without restraint and then decline to follow up. Degus, South American rodents, kick each other over in play as they do in earnest. In serious fights the winner goes straight in to bite in about 97 per cent of cases. In play fights the attack is pursued in 13 per cent. The third is to press the advantage until the loser signals submission. In juvenile Visayan warty pigs the winner stops only when the other flees or adopts a submissive posture, and in 30 per cent of cases the pig that submitted then launches a playful attack of its own.

These are findings about rats, degus, pigs and some monkeys, all observed with familiar partners. The 2017 review notes that adult rats follow the same rules as juveniles when play fighting. Its authors stress in 2024 that the mechanisms of restraint vary across species and that the variation "mitigates simple generalities". Much of both reviews concerns what play does for a developing animal. We leave that out and take only the description.

Our piece on what a tap is read five rule sets that define the signal for competition, and argued that a round in a gym is left to whatever convention the room teaches. What rooms publish about the round is etiquette, and some of it says outright that a round is not a fight.

Impact Jiu Jitsu, the academy whose etiquette sheet that piece quoted, says of its striking classes: "We are not fighting, we are learning." Of the hand slap and fist bump before each grapple it says: "This is a sign of respect and recognizing that we are training, not fighting." On what is permitted, the sheet says the academy generally follows the International Brazilian Jiu-Jitsu Federation on which moves are allowed, and at which belt or skill level. Dark Path Grappling, in Surrey, asks for the same gesture before and after each roll and attaches a consequence: "if respect is lacking, it may impact your invitation back to the gym".

Two articles published by Easton Training Center, a group of academies in Colorado, write down the matching of effort. Dalton Anderson's list of unspoken rules, from October 2022, includes "Match the strength of smaller partners". It also says "No one is keeping track of points when we're training". Arthur Yensan, in July 2025, makes intensity a matter of agreement: "A good training partner knows how to match intensity. If we're flowing, we're flowing. If we agree to go hard, then we both know what we signed up for." Dark Path asks members to help training partners, "especially if there's a significant skill gap".

That is four pages from three publishers, and they are evidence about those rooms only. Anderson himself calls such rules unspoken, ones "you won't find hanging on the walls in your academy".

One peer-reviewed paper makes the connection directly. In 2021 Tony Blomqvist Mickelsson, of Sodertorn University, and Pilo Stylin, of Sweden's budo and martial arts federation, published a model in Frontiers in Psychology that treats sparring as rough-and-tumble play, the term developmental psychology uses for play fighting. Their interest is developmental, and we do not repeat those claims. What matters here is how they describe sparring: "A substantially physically heavier practitioner will need to engage in more self-handicapping and determine the pace, turn-taking, etc., to a greater degree than practitioners who are evenly physically matched."

The paper is a model and reports no observations of its own. Both authors are coaches, and they say so: "we admit our bias and passion". They also mark where the idea stops. "While sparring can be shaped and, to some degree, subject to turn-taking, MA competition logically does not allow for this." MA is martial arts.

Alex Channon, reviewing Janet O'Shea's Risk, Failure, Play in Martial Arts Studies in 2019, gives her question as "how and why sport fighting feels so profoundly different from real-world violence", and her answer as resting on meanings built through rules, spaces and norms of etiquette. He notes that she works from theory and reflection more than from systematic data. We did not read the book.

What follows is this site's argument. The play fighting reviews are about animals, and no gym page read here mentions that research. The Swedish paper proposes the link and does not test it. We found no study that does.

The resemblance is specific all the same. The reviews describe a contest that stays playful because the party with the advantage gives some of it up: a rat stands where it can be tipped off, a degu lets the other get up. Easton's rule about smaller partners asks for the same thing in six words, and the Swedish authors use the reviewers' own term for it. Role reversal is harder to find in print; the nearest we read is Yensan's good partner, who tries things, sometimes fails, and so makes room for the other person to do the same. The third strategy, pressing on until the other signals submission, is close enough to the tap that the comparison needs no help from us.

The literature also describes what follows when restraint fails: one-sided play relationships are unstable, and rough players may be ostracized. Dark Path's sentence about an invitation back reads like the same sanction, and so does Anderson's warning that a person who is "extremely rough and aggressive when rolling" will be treated that way in return.

The limits are as specific. Rats, degus and pigs are not evidence about people on a mat. Competition sorts grapplers by weight, as our piece on leverage and the smaller person read from the rule books, while the gym pages leave the adjustment to the bigger partner. We take no view on what a round does for anybody. Nor is every round play: the Swedish authors say competition does not allow turn-taking at all.

So the word is apt in a narrow sense. A roll, like a play fight in these descriptions, is a real contest held inside limits that both parties keep, and it stays what it is only while they keep them. The reviews treat restraint by the party with the advantage as what sustains play, and the gym pages ask for it as manners. Whether it does in a training room what it is said to do among juvenile rats has not been tested in anything we found.