Duck gait is detected in congenital and acquired diseases of the hip joint, Kashin-Beck disease, osteomalacia of various origins, myopathies, Lambert-Eaton syndrome. Can be single or double sided. The reason is established on the basis of anamnestic data, the results of a survey, an external examination, a neurological examination, radiography, CT, electrophysiological studies, and other instrumental and laboratory techniques. Treatment is determined by the etiology of the disorder, includes drug therapy, exercise therapy, physiotherapy, and surgical interventions.