“Fight against the sedentary life”, which is part of the project "Healthy lifestyle", starts with an epidemiological research that will involve over 120,000 High Schools mostly from European nations, but also from other non-European nations such as U.S.A., Canada, Australia, Japan etc. with the involvement of more than 1,000,000 students among males and females aged 14 to 19. This is a multicentric research, developed in two phases (First and Second Phase), which will allow to detect some anthropometric and functional data of utmost importance as indicators of a predisposition to develop, in a long period, pathologies such as cardiovascular diseases, secondary diabetes, osteoporosis, some forms of cancer, depression, etc ..