The Number Nobody Will Write Down

At a well-run hunter show, a sound horse can jump nine times before lunch. A pair of pre-green trips, two in the division, a handy round, then the same animal tacked up again for a junior's equitation. No one in that sequence has broken a rule. That is precisely the thing the sport has spent the past year circling and still declines to settle with a number.

In June 2025, US Equestrian adopted a formal Statement of Position on Equine Overuse, developed in collaboration with Equestrian Canada and shaped by a veterinary summit held that March at the World Equestrian Center in Ocala, where roughly thirty veterinarians spent two days sorting evidence-based care from the anecdotal. A white paper followed on 14 July 2025. The statement is careful and, in places, quietly damning. It concedes that overuse "may be assessed by calendar year, competition period, month, week, competition, or by day," and it lists what a taxed horse looks like: exhaustion, lameness, changes in stride, resistance to move forward, use of both leads, deterioration of jumping style. It is an unusually candid description of a problem. It sets no limit on any of it.

A definition is not a limit

A position statement is a description of a value. A rule is an instruction with a consequence. The distance between the two is where this debate has lived for a year, and the 2026 rule-change cycle is finally forcing the question. Among the USHJA proposals now in front of the membership are measures that would cap the number of classes a horse or pony may enter per day, one of them keyed to a chart that scales with the length of the show and the type of class, and a separate rule that would prohibit any horse from being shown in nine or more over-fences classes, hunter, jumper and equitation combined, in a single day. Their authors are explicit about the motive: in an era preoccupied with the sport's social license to operate, a horse making its ninth trip in an afternoon is not a good look, and it photographs even worse.

Across this year's USHJA town hall series, overshowing came up again and again, and the conversation kept snagging on the same point: everyone agrees the practice exists, and no one wants to be the person who writes down the number that makes it stop. The reluctance is understandable. It is also the whole ballgame.

What the load actually does

The reason a limit matters is that the cost of repetition is largely invisible until it isn't. Work at Utrecht University's Department of Equine Sciences, led by Ellen de Graaf-Roelfsema, established that overtraining in horses announces itself late and quietly: the classic sign is a decline in performance despite the same or an increased workload, accompanied by dulled mood and diminished interest in surroundings. Her group went looking for something earlier, studying nocturnal growth-hormone secretion in young horses as a possible marker precisely because the behavioral signs arrive after the damage is underway. The animal that stops meeting the jumps is not being difficult. It is reporting.

The tissue tells the same story more bluntly. Research from the Royal Veterinary College in London on the superficial digital flexor tendon, the energy-storing structure most exposed by galloping and jumping, describes injury not as an event but as an accumulation: matrix microdamage builds faster than the tendon's cells can repair it between loading cycles, and that silent backlog precedes clinical tendinopathy. Because tendon is a slowly healing, poorly regenerative tissue, the RVC group notes, timely adjustment of the workload does more good than any treatment applied after the fact. Every extra trip is another set of loading cycles laid onto a structure that keeps no visible ledger until it fails.

The scale is not hypothetical. A 2024 descriptive study of British eventing horses by Tranquille, Chojnacka and Murray, published in Animals, drew 1,677 completed surveys and found that 49.4 percent reported a previous lameness or musculoskeletal problem, with 26 percent inside the prior six months. The most frequently recorded issues involved the foot, joints, back, tendon and ligament, and horses with deep digital flexor tendon injuries stayed out of training the longest, frequently beyond a year. These are the structures a day of repeated over-fences work loads most directly, and they are the ones that bill you last. The physiological cost surfaces elsewhere too, in the flat coat and the gastric ulceration that shadow a horse kept too long at the top of its output.

The case for leaving it alone

The argument against a hard cap deserves a fair hearing, because it is not frivolous. Horses are not interchangeable: a fit, correctly managed campaigner doing six low trips over forgiving courses may be under less genuine strain than a green horse doing three at height on hard ground. A blanket number is a blunt instrument, and blunt instruments punish the conscientious alongside the careless. The people best placed to judge a given horse's tolerance on a given day are the trainer and the veterinarian who know it, not a chart drafted in committee. And a rule is only as good as its enforcement; a limit that stewards cannot realistically police becomes theatre, the appearance of action standing in for the thing itself. Rider autonomy, in this telling, is not an evasion but the correct location of the decision.

Why the number still has to exist

All of that is true, and none of it is sufficient. The autonomy argument assumes the decision-maker's incentives are clean, and at a rated show they frequently are not. Entries are paid, points are counted, a client is watching, and the marginal trip is nearly free to the person who benefits from it and expensive only to the horse, who cannot enter the conversation. That is the exact situation a rule exists to correct: not to override good judgment, but to hold a floor beneath the moments when judgment and interest diverge. The load science makes the floor necessary rather than merely tidy, because the horse's own warning system reports late, and by the time performance visibly declines the tendon has already been keeping its private accounts for some time.

A sport that can define overuse in six precise clauses and then decline to attach a single number to it has not run out of knowledge. It has run out of nerve.

The blunt-instrument objection is real but self-limiting: a cap set generously, well above what any well-managed horse would reach, costs the conscientious nothing and removes only the extremes that no defensible standard of care would endorse. Nine over-fences trips in a day is not a close call. Enforcement is a genuine hurdle, but the sport already counts entries to the class for scoring and billing; the ledger it needs to protect horses is the same one it keeps to collect fees. The infrastructure exists. What is missing is the willingness to point it at welfare.

A year on from the position statement and the white paper, the sport has produced an admirable amount of language and not one enforceable limit. The 2026 proposals are the test of whether "overuse" is a value the discipline is prepared to price, or a word it prefers to admire from a safe distance. The horses have already cast their vote, in the only ledger that cannot be edited. It would be a good year to read it back.