Complex investigations of adolescences (14-15 years) residing on the European North at 62 and 65 degrees latitudes have been carried out. It was shown that the latitude factor on the North affected on mature organism of adolescences already at a difference of residence place on 3 degrees. The decrease of tolerance to hypoxemia, quality of hemodynamic regulation at short-term physical activity, physical health level, nervous processes rate (switching of attention) and the increase of plasma lactate level (attribute of hypoxia) were shown in adolescences residing at higher latitudes. The sexual distinctions and features of northerner organism on a lot of parameters in adolescences were revealed.