"Mental health is an important health component throughout the lifecycle and forms an integral part of an individual's ability to lead a fulfilling life. Thus, childhood obesity keeps growing as a phenomenon in Latin American countries causing an enormous social, economic and mental health burden to individuals, families and wider society. Subjective well-being affects how people think, communicate, learn and develop and is a precondition for successful participation in interpersonal relationships, education, work and in society as a whole. On the other hand, poor mental health and physical health impedes an individual’s capacity to realize their potential, work productively, and make a contribution to their community. The general aim of CIELO projects is to increase the competences of HEI teachers and students in the field of health promotion in Latin America for the purposes of obesity prevention and mental health promotion. This aim is achieved by co‐operatively developing Post Graduate Training Programme (online course of 15 credit points divided to 3 courses with 5 credit points each) and mobile application eToolkit ""obesity prevention and mental health promotion"" for the participating eight HEI’s. Specific objectives are: 1) Enhance the competences, knowledge and best practices of Mexican, Chilean and Costa Rican HEI teachers, students and working life professionals related to child obesity prevention and mental health promotion, 2) Development and face validity of the post graduate training programme (15credits) in Latin American countries, 3) Development, piloting, and evaluation of the post graduate training programme online courses related to obesity prevention and mental health promotion, 4) Develop and disseminate the mobile application eToolkit for obesity prevention and health promotion, and 5) Influence on policy level sustainability of the project results in Latin America. According to current evidence of COVID-19 in Latin America shows that, individu"