https://matteocampagna.com/en/registry/physical-training/fatigue-and-bow-sway 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/physical-training/fatigue-and-bow-swayTwo studies, a year apart, measured the two halves of the same chain. The first took seven university archers and had them hold the shooting position to exhaustion: the frequency of the posterior deltoid's electrical signal falls in all seven, and the tremor that appears between eight and twelve hertz shows up in the oscillation of the bow limb, with a coherence between 0.81 and 0.96. Fatigue, in other words, reaches the bow. The second applied a fatigue protocol to twelve Italian archers and found the sideways sway of the bow increased in all twelve, by six to thirty-nine per cent and twenty per cent on average, while the centre of pressure under the feet did not shift: fatigue moves the bow, not the base. Two small studies, neither with a control group, and one detail to bear in mind, because the same signal also contains a slow oscillation between two and five hertz that fatigue does not change and that depends on movement control. On the target the two are indistinguishable. Twenty years later a thesis on eight elite recurve archers saw the wrists, elbows and shoulder move faster and the score drop when the aim was stretched to two and three times the usual time, but without measuring either fatigue or the bow.claim:fatica-oscillazione-arco:revision:2026-10-15:2Thu, 15 Oct 2026 08:00:00 GMT https://matteocampagna.com/en/registry/physical-training/fatigue-and-bow-sway#storiaTwenty years on, related figures arrive from a master's thesis on eight elite British recurve archers: holding the aim two and three times longer than usual, the wrists, elbows and shoulder move faster in the last second before release and the score per arrow falls from 8.6 to 7.8. The author speaks of fatigue but does not measure it, the bow is not tracked and the conditions always come in the same order, so the longer hold coincides with the arrows already shot: a hint consistent with the claim rather than evidence for it, and the status stays reported on the two studies from the nineties.claim:fatica-oscillazione-arco:history_entry:2026-09-02:2015Wed, 02 Sep 2026 08:00:00 GMT https://matteocampagna.com/en/registry/physical-training/fatigue-and-bow-swayclaim:fatica-oscillazione-arco:new_claim:2026-07-20:riportatoMon, 20 Jul 2026 08:00:00 GMT