INTEGRActiv builds on a consortium -4 partners (including the coordinator) plus one collaborator- from 4 EU contries with outstanding expertise in different facets of the fields of obesity, physical activity, nutrition, metabolic health and its application in biomarkers research. It includes members of internationally reputed centers, institutes or groups with experience in collaborative EU projects, contributing with state-of-the-art of biomarker concepts and methods to build up an interdisciplinary team able to identify the new biomarkers for physical activity and health in humans focused in children and adolescents.