Fabrication of laser-induced graphene-based multifunctional sensing platform for sweat ion and human motion monitoring

•LIG sensing platform achieves the dual sensing: K+ and Na+ ion concentration measurement and human motion monitoring.•The hydrophobic LIG electrode prevents corrosion from sweat.•The LIG sensing platform monitors muscle contraction/relaxation with high sensitivity.•The LIG sensing platform measures a wide range of ion concentrations with high sensitivity.