https://matteocampagna.com/en/registry/health/string-hand-skin-microcirculation 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/health/string-hand-skin-microcirculationTwo small studies of archers, each on a different piece, and a third in kyudo that does not isolate the string hand. On the skin the data are the simplest: in eight Japanese university archers the index fingertip of the string hand is harder than that of six students who do not shoot (49.3 against 39.8 on the durometer scale), and where the skin is harder small differences in pressure tend to be told apart slightly less well, although the right hand was measured in the controls and the groups are tiny. On the vessels the clearest data come from a case examined with capillaroscopy in 2020: a sixteen-year-old compound archer with finger pain has dilated capillaries, with microhaemorrhages, only on the index, middle and ring fingers of the string hand, the three fingers that hook the string, with the thumb, little finger and bow hand unaffected and every test for autoimmune disease negative. It is the strongest argument for tying the picture to the movement, but it is a single case. The 2004 kyudo study finds in its seven practitioners a weaker response of the finger vessels to raising the arm than in kendo masters (137 against 233 per cent), but the difference appears with both arms, the masters have a mean age of 43.7 against university students, and when the arm is lowered neither the discipline nor the hand makes a difference: it says something about the group, not about the string hand. Riportato: the string fingers do change, but nobody knows how often, or where adaptation ends and damage begins.claim:mano-corda-dita-adattamenti:revision:2026-04-21:2Tue, 21 Apr 2026 08:00:00 GMT https://matteocampagna.com/en/registry/health/string-hand-skin-microcirculationclaim:mano-corda-dita-adattamenti:new_claim:2026-04-02:riportatoThu, 02 Apr 2026 08:00:00 GMT