Ion-conductive　(IC)　hydrogels　as　ionic　skins　(I-skins)　have　shown　vast　potentials　in　wearable　electronic　devices,　human-machine　interfaces,　and　health　monitoring.　However,　it　is　still　challenging　to　fabricate　IC　hydrogels　with　high　stretchability　and　robust　elasticity　to　stably　output　electrical　signals　subjected　to　multiple　mechanical　cycles.　In　this　work,　profiting　from　the　hydrophobicity-assisted　multiple　hydrogen　bonds　formation　by　N-acryloyl　phenylalanine　(APA),　we　develop　an　IC　hydrogel　sensor　with　comprehensive　performances　by　one-pot　radical　polymerization　of　APA　and　acrylic　acid　(AA)　in　the　presence　of　ferric　chloride　(FeCl3).　The　hydrogels　show　excellent　mechanical　properties　with　tensile　strength　of　210–400　kPa,　fracture　strain　of　880–1100%,　and　elastic　modulus　of　71–94　kPa,　and　could　withstand　multiple　mechanical　cycles　(1000　tensile　cycles　with　100%　of　strain　and　1000　compressive　cycles　with　40%　of　strain)　with　robust　elasticity.　Moreover,　the　hydrogels　feature　high　conductivity　(0.55　S/m),　excellent　sensing　performance　(gauge　factor　(GF)　=　7.95),　and　wide　sensing　range　of　strain　(2.5–300%)　and　pressure　(1–80　kPa),　which　can　be　utilized　for　the　detection　of　large　and　tiny　movements　of　human　body　and　the　monitoring　of　sleep　quality　with　reliable　signal　outputs.　Based　on　the　adequate　tissue　adhesiveness,　rapid　self-recovery,　excellent　fatigue　resistance　and　good　biocompatibility,　the　IC　hydrogels　can　serve　as　promising　smart　flexible　electronics　for　the　application　in　different　fields.　©　2022