There are health risks and benefits associated with going barefoot. Footwear provides protection from cuts, abrasions, and bruises, from objects on the ground, as well as protection from frostbite and parasites like hookworm. However, some shoes can limit the flexibility and mobility of the foot, and can lead to higher incidences of flat feet or toes that curve inwards. Walking barefoot also results in a more natural gait, allowing for a more rocking motion of the foot and eliminating the hard heel strike and generating less collision force in the foot and lower leg.