A hybrid-fiber nanogenerator comprising a ZnO nanowire array, PVDF polymer and two electrodes is presented. Depending on the bending or spreading action of the human arm, at an angle of similar to 90 degrees, the hybrid fiber reaches electrical outputs of similar to 0.1 V and similar to 10 nA cm(-2). The unique structure of the hybrid fiber may inspire future research in wearable energy-harvesting technology.