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Inspired by the structure\u2010property relationships of biological tissues, we developed a pre\u2010alignment and subsequent cross\u2010linking strategy to fabricate a hierarchically anisotropic double\u2010network (DN) hydrogel that exhibits remarkable toughness, exceptional fatigue resistance, and high conductivity. The anisotropically aligned polymer network, synergistically combined with deformable liquid metals (LM) particles, enables efficient stress transfers and crack propagation suppression. The hydrogels exhibit a high fracture energy of 60.6\u00a0kJ m\n                    <jats:sup>\u22122<\/jats:sup>\n                    and an ultrahigh fatigue threshold of 5560 J m\n                    <jats:sup>\u22122<\/jats:sup>\n                    , while maintaining a human skin\u2010matching modulus of 1.3\u00a0MPa. Furthermore, the LM particles impart relatively high conductivity, enabling the use of composite hydrogels as stretchable sensor devices for stable and reliable motion monitoring. This study provides a new strategy for fabricating anisotropic hydrogels with superior mechanical and conductive properties, advancing their applications in wearable electronics and soft robotics.\n                  <\/jats:p>","DOI":"10.1002\/smll.202512709","type":"journal-article","created":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T14:06:32Z","timestamp":1769781992000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Liquid Metal\u2010Reinfored Hierarchically Aligned Double\u2010Network Hydrogels: Ultrahigh Crack\/Fatigue Resistance and Strain\u2011Responsive Sensing"],"prefix":"10.1002","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-9815-7459","authenticated-orcid":false,"given":"Pengcheng","family":"Cui","sequence":"first","affiliation":[{"name":"South China Advanced Institute for Soft Matter Science and Technology School of Emergent Soft Matter South China University of Technology  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Electric Power University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8257-4937","authenticated-orcid":false,"given":"Suhua","family":"Wang","sequence":"additional","affiliation":[{"name":"Guangdong Provincial Key Laboratory for Green Agricultural Production and Intelligent Equipment School of Environmental Science and Engineering Guangdong University of Petrochemical Technology  Maoming 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