The excessive mass of a body and obesity is a serious problem with which are associated a number of diseases. For studying of distribution in populations of the city Krasnoyarsk of prevalence of obesity in people in dependence on gender and age and identifications of anthropological predictors for occurrence of excess weight of a body it was made anthopometrical inspection of 2357 female people and 1936 people man's in 4-89 years old. New in research is in application of an integrated approach to an obesity problem from positions of biomedical anthropology, namely in application of fractionation of weight of a body on fat and muscular components. It is established that formation of a constitution begins at children's age and during the various periods of an ontogenetic cycle undergoes a number of transformations that leads to redistribution of frequency of occurrence of persons, whose mass of a body exceeds norm. At early stages of post-natal development this problem often is available for men. At adult age groups a changes of weight of a body from norm towards its increase are more characteristic for women.