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Here, we report a strain\u2010decoupled serpentine heterostructured hydrogel electrode (SHGE) that integrates a laser\u2010patterned serpentine geometry with a laminated bacterial cellulose\/tannic acid supporting layer and a conductive MXene\/poly(vinyl alcohol) hydrogel layer. The heterostructure provides interfacial hydrogen bonding and topological interlocking, while NaOH\u2010induced PVA nanocrystalline domains and the serpentine layout jointly suppress crack propagation and localize deformation away from the sensing interface. As a result, the SHGE exhibits a fracture energy of 23.4\u00a0kJ m\n                    <jats:sup>\u22122<\/jats:sup>\n                    , suppressed resistance drift under 0\u00b0\u2013120\u00b0 bending, stable electrical output over 50 000 bending cycles, and strain\u2010insensitive operation up to 70% deformation. During dynamic electromyography and electrocardiography recordings, the SHGE reduces motion\u2010induced baseline fluctuation and maintains higher signal\u2010to\u2010noise ratios than commercial Ag\/AgCl electrodes across multi\u2010day and outdoor exercise protocols. When integrated with a wireless acquisition module and a machine\u2010learning classifier, the high\u2010fidelity signals enable classification of eight representative human motions with an overall accuracy above 90% under the tested data\u2010splitting protocol. The same heterostructure strategy enhances fracture resistance across multiple polymer matrices, indicating a general design route for deformation\u2010resistant hydrogel bio\u2010interfaces.\n                  <\/jats:p>","DOI":"10.1002\/adma.75248","type":"journal-article","created":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T04:17:34Z","timestamp":1791260254000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Strain\u2010Decoupled Serpentine Heterostructured Hydrogel Electrodes for Motion\u2010Artifact\u2010Resistant Electrophysiology"],"prefix":"10.1002","author":[{"given":"Chao","family":"Wang","sequence":"first","affiliation":[{"name":"Discipline and Technology Center for High Temperature Functional Ceramics Shandong Key Laboratory of Functional\u2010Structural Integrated Ceramics School of Materials Science and Engineering Shandong University of Technology  Zibo 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