Anthropometric examination, analysis of the component composition of the body and somatotyping according to the scheme of V.P. Chtetsov, was performed on 248 young men and men of the first mature age living in the conditions of the European North. It is shown that the majority of the examined have a normal body weight (youth - 75,3%, men -63,8%). The body weight deficit in young men is more common, and overweight and obesity are more common in men of the first mature age. In both groups of men, the abdominal somatotype prevails. In the second place - muscular type, on the third - thoracic and on the fourth - indefinite. It has been established that young men and men of muscular somatotype have a greater content of muscle mass in the body. 38,1% of men with abdominal somatotype showed an increased body weight. It was established that youth and men of muscular somatotype have a greater content of muscle mass in the body. The absolute content of the muscular component in them is 35,8±0,9 and 36,7±1,6, respectively, and the relative content is 42,2±0,7 and 45,0±1,4 kg (p<0,05). For individuals with an indeterminate somatotype, average values of muscle mass are typical, and for the chest muscle - minimal. Moreover, in men of these somatotypes, the absolute values of muscle mass decreased markedly from adolescence to the first adult age. Thus, in the persons of the chest somatotype they were 28,9±0,6 and 26,9±2,4 kg respectively. It is shown that the environment stimulates the development of certain morpho-functional structures of the body, which provide the best level of adaptation to the conditions of the North. The revealed regional features probably provide the best level of adaptation of the organism to the conditions of the European North, which indicates the formation of a phenotype adapted to living conditions in the northern region.