When performance falters without warning, is it the body or the mind that fails?
In a fascinating piece for Finland’s national broadcasting company, journalist Hannes Nissinen unpacks a bizarre and little understood condition haunting Finnish darts players: dartitis, a mysterious affliction that causes even elite athletes to suddenly and inexplicably lose the ability to release the dart from their hand. “It struck like lightning from a clear sky,” says Jyri Ussa, one of Finland’s top-ranked players, recalling the moment during a national championship when his hand simply froze: “there was no pain, except mentally.”
Dartitis, known in medical terms as task-specific dystonia, is a rare neurological condition that primarily affects people performing high-repetition fine motor tasks such as musicians, golfers and now it seems, dart throwers. Ussa, who trains obsessively and once dismissed dartitis as an excuse for poor performance, found himself on the receiving end of its sudden onset: “I didn’t admit it to anyone unless they asked.”
The phenomenon is not new. British darts legend Eric Bristow famously succumbed to it in 1986, and Veijo Viinikka, executive director of the Finnish Darts Association, recalls how it blindsided him during a competition in 1993: “It was a terrible nightmare” – one that lasted for a year and a half. Viinikka, like Ussa, described a deep sense of shame and confusion: how could a simple, mechanical action suddenly become impossible?
Rebekka Ortiz, a specialist in movement disorders at Tampere University Hospital, explains that in cases of task specific dystonia, neural signals from the brain to the muscles misfire. “It’s a bit like a computer bug in the brain.” The result: involuntary muscle contractions that paralyse performance. The condition’s precise cause is unknown, but it tends to affect those who have practised the same motion to perfection for years. “When you train one movement excessively, the fine-tuning circuitry in your brain can get scrambled,” says Ortiz.
Crucially, many players describe dartitis as both physiological and psychological. The symptoms often emerge under pressure (on stage, in competition) but persist even in private practice. “It’s not just choking” Ortiz clarifies, using a term often used to describe seizing up in sports’ competitions or musical performances: “The fact that symptoms continue outside public performance suggests a deeper neurological basis.”
For some, recovery has been possible. Viinikka, after 18 months, re-learned how to throw using different muscles and even went on to win the Finnish championship. “I cried with joy,” he recalls. Ussa, too, has managed to return to competition, though the spectre of dartitis still looms. “My hand trembles a bit, but the full lock hasn’t returned,” he says, cautiously optimistic. Still, he refuses to demonstrate how bad things got: “I’m afraid the symptoms will come back.”
More than just a sports mystery, this piece is a meditation on vulnerability, perfectionism and the psyche’s role in physical mastery. Players, once confident and invincible, are suddenly brought to a halt by their own nervous systems. And in a sport defined by repetition, where success is measured in millimetres, that disruption is not just frustrating, it destablises identity.
“Everyone says darts is a hobby,” Ussa reflects. “But if you do it long enough, travel the country, it becomes a way of life.”
As with writer’s cramp or musician’s dystonia, dartitis reveals the body’s capacity to rebel against perfection.
Original article (“Suomalaisia tikanheittäjiä vainoaa mystinen vaiva: he eivät yhtäkkiä pysty heittämään tikkaa”) by Hannes Nissinen was first published in Finnish on 7 June 2025.
It’s available here.
Yle is Finland’s national public broadcasting company streaming out of Helsinki. It was founded in 1926.
Summary by ZN
