https://matteocampagna.com/en/registry/mind/kyudo-early-release-commonest-problem Changes to this claim in Matteo Campagna's evidence registry: its status, its year-by-year history, revisions of the page. en-gb https://matteocampagna.com/en/registry/mind/kyudo-early-release-commonest-problemThe only study to count shooting problems in kyudo surveyed the members of the kyudo clubs of two Japanese medical schools, in Gifu and Kumamoto, in December 2018: of the 65 who replied, 41 said they had had at least one, and 35 of them, 85 per cent, had hayake, the release that goes before the aim is complete. In 26 it was the only problem, while the other three types described by tradition were far rarer: 7 cases of jerking while aiming (biku), 7 of arm tremor (yusuri) and 3 of being unable to release (motare). The order in which they appear also says something: biku never occurred on its own and, in the five who had it together with hayake, it came later in four cases, while tremor tended to come before hayake, in three cases out of four. It is a single questionnaire, of university students, with the history of each problem recalled from memory, and it applies to kyudo: in Olympic recurve the clicker and the mechanics of the release change the problem.claim:hayake-yips-kyudo:revision:2026-08-29:2Sat, 29 Aug 2026 08:00:00 GMT https://matteocampagna.com/en/registry/mind/kyudo-early-release-commonest-problemclaim:hayake-yips-kyudo:new_claim:2026-08-25:riportatoTue, 25 Aug 2026 08:00:00 GMT