Hydrogels　possess　significant　potential　for　the　development　of　multifunctional　soft　materials　in　smart　sensors　and　wearable　devices,　attributed　to　their　distinctive　properties　of　softness,　conductivity,　and　biocompatibility.　Nevertheless,　their　widespread　application　is　frequently　limited　by　inadequate　mechanical　strength　and　strain　capacity.　This　study　introduces　a　meticulously　engineered　hydrogel　system,　LM/SA/P(AAM-co-BMA),　which　integrates　eutectic　gallium-indium　alloy　(EGaIn)　as　both　a　polymerization　initiator　and　a　flexible　filler.　The　resultant　hydrogel　demonstrates　remarkable　tensile　strain　capabilities　of　up　to　2800%　and　a　tensile　strength　of　2.3　MPa,　achieved　through　a　synergistic　interplay　of　ionic　coordination,　hydrogen　bonding,　and　physical　polymer　interactions.　Furthermore,　the　hydrogel　exhibits　outstanding　biocompatibility,　recyclability,　and　stable　long-term　storage,　rendering　it　an　ideal　candidate　for　the　continuous　monitoring　of　high-intensity　physical　activities.