Impact-attenuation members include body portions, optionally with an arched structure, that define a base orientation and an open space; and a spring member extending across the open space and engaging the body portion(s). When a force is applied to the body portion(s) in at least some orientations and/or directions of incident force, e.g., so as to change the impact-attenuation member out of its base orientation, the spring member may exert a force that urges the impact-attenuation member back toward the base orientation. Various example structures for the impact-attenuation member are described. Such impact-attenuation members may be used in articles of footwear or other foot-receiving device products.